diff --git a/Container.py b/Container.py
index 2e8e25a7..908d0eda 100644
--- a/Container.py
+++ b/Container.py
@@ -76,6 +76,11 @@
 	import WizardGUI
 	import LabelGUI
 
+	RED = '#d91e1e'
+	GREEN = '#90ee90'
+	BLACK = '#000000'
+	BLUE = '#add8e6'
+
 import Components
 
 if builtins.__dict__.get('GUI_FLAG',True):
@@ -1184,7 +1189,7 @@ class Shape(ShapeEvtHandler):
 	""" Shape class
 	"""
 	
-	FILL = ['#add8e6']
+	FILL = [BLUE]
 	
 	def __init__(self, x=[], y=[]):
 		""" Constructor
@@ -2814,7 +2819,7 @@ def __init__(self, line):
 		"""
 		Shape.__init__(self)
 
-		self.fill = ['#d91e1e']
+		self.fill = [RED]
 		self.x = array.array('d', line.x)
 		self.y = array.array('d', line.y)
 
@@ -3847,7 +3852,7 @@ class ContainerBlock(Block, Diagram):
 	""" ContainerBlock(label, inputs, outputs)
 	"""
 
-	FILL = ['#90ee90']
+	FILL = [GREEN]
 	
 	###
 	def __init__(self, label = 'ContainerBlock', nb_inputs = 1, nb_outputs = 1):
@@ -4114,7 +4119,7 @@ def draw(self, dc):
 		x,y = self.item.getPortXY('input', self.index)
 		self.moveto(x, y)
 
-		self.fill = ['#00b400'] #GREEN
+		self.fill = [GREEN]
 
 		dc.SetFont(wx.Font(10, wx.MODERN, wx.NORMAL, wx.NORMAL))
 
@@ -4185,7 +4190,7 @@ def draw(self, dc):
 		"""
 		x,y = self.item.getPortXY('output', self.index)
 		self.moveto(x, y)
-		self.fill = ['#ff0000']
+		self.fill = [RED]
 
 		dc.SetFont(wx.Font(10, wx.MODERN, wx.NORMAL, wx.NORMAL))
 		#dc.SetPen(wx.Pen(wx.NamedColour('black'), 20))
@@ -4225,7 +4230,7 @@ def __init__(self, item, index, cf, t = 'rect'):
 		"""
 		Node.__init__(self, item, index, cf, t)
 
-		self.fill = ['#000000'] #BLACK
+		self.fill = [BLACK]
 
 	def draw(self, dc):
 		""" Drawing method.
@@ -4325,7 +4330,7 @@ def draw(self, dc):
 		"""
 
 		CircleShape.draw(self, dc)
-		w,h =  dc.GetTextExtent(self.label)
+		w,h = dc.GetTextExtent(self.label)
 
 		### label position manager
 		if self.label_pos == 'bottom':
@@ -4342,8 +4347,8 @@ def draw(self, dc):
 		dc.DrawText(self.label, mx, my)
 
 		if self.lock_flag:
-			img =  wx.Bitmap(os.path.join(ICON_PATH_16_16, 'lock.png'),wx.BITMAP_TYPE_ANY)
-			dc.DrawBitmap( img, self.x[0]+w/3, self.y[0])
+			img = wx.Bitmap(os.path.join(ICON_PATH_16_16, 'lock.png'),wx.BITMAP_TYPE_ANY)
+			dc.DrawBitmap(img, self.x[0]+w/3, self.y[0])
 
 	def leftUp(self, event):
 		""" Left up event has been invoked.
@@ -4403,15 +4408,15 @@ def __repr__(self):
 
 #------------------------------------------------------------------
 class iPort(Port):
-	""" IPort(label)
+	""" IPort(label) for ContainerBlock (coupled model)
 	"""
 
 	def __init__(self, label = 'iPort'):
-		""" Constructor
+		""" Constructor.
 		"""
 
 		Port.__init__(self, 50, 60, 100, 120, label)
-		self.fill= ['#add8e6']          # fill color
+		self.fill= [GREEN]
 		#self.AddAttribute('id')
 		self.label_pos = 'bottom'
 		self.input = 0
@@ -4430,7 +4435,7 @@ def __repr__(self):
 
 #----------------------------------------------------------------
 class oPort(Port):
-	""" OPort(label)
+	""" OPort(label) for ContainerBlock (coupled model)
 	"""
 
 	def __init__(self, label = 'oPort'):
@@ -4438,7 +4443,7 @@ def __init__(self, label = 'oPort'):
 		"""
 
 		Port.__init__(self, 50, 60, 100, 120, label)
-		self.fill = ['#90ee90']
+		self.fill = [RED]
 		#self.AddAttribute('id')
 		self.label_pos = 'bottom'
 		self.input = 1
diff --git a/DetachedFrame.py b/DetachedFrame.py
index 6f39236d..e8e4d399 100644
--- a/DetachedFrame.py
+++ b/DetachedFrame.py
@@ -29,8 +29,12 @@
 	wx.ST_SIZEGRIP = wx.STB_SIZEGRIP
 
 if __name__ == '__main__':
-	builtins.__dict__['DEVS_DIR_PATH_DICT'] = {'PyDEVS':os.path.join(os.pardir,'DEVSKernel','PyDEVS'),'PyPDEVS':os.path.join(os.pardir,'DEVSKernel','PyPDEVS')}
-	builtins.__dict__['DEFAULT_DEVS_DIRNAME'] = 'PyPDEVS'
+	builtins.__dict__['GUI_FLAG'] = True
+	builtins.__dict__['HOME_PATH'] = os.path.abspath(os.path.dirname(sys.argv[0]))
+	builtins.__dict__['DEFAULT_DEVS_DIRNAME'] = "PyDEVS"
+	builtins.__dict__['DEVS_DIR_PATH_DICT'] = {\
+	'PyDEVS':os.path.join(os.pardir,'DEVSKernel','PyDEVS'),\
+	'PyPDEVS':os.path.join(os.pardir,'DEVSKernel','PyPDEVS', 'old')}
 
 import Container
 import Menu
@@ -61,11 +65,14 @@ def __init__(self, parent=None, ID=wx.NewIdRef(), title="", diagram=None, name="
 								name=name,
 								style=wx.DEFAULT_FRAME_STYLE | wx.CLIP_CHILDREN)
 
+		self.default_style = self.GetWindowStyle()
+
 		### local Copy
 		self.title = title
 		self.parent = parent
 		self.diagram = diagram
 
+
 		### current abstract level
 		#=======================================================================
 		if hasattr(diagram, 'layers') and hasattr(diagram, 'current_level'):
@@ -100,7 +107,7 @@ def __init__(self, parent=None, ID=wx.NewIdRef(), title="", diagram=None, name="
 			self.toggle_list = wx.GetApp().GetTopWindow().toggle_list
 		else:
 			sys.stdout.write(_('Alone mode for DetachedFrame: Connector buttons are not binded\n'))
-			self.toggle_list = [wx.NewIdRef(), wx.NewIdRef(), wx.NewIdRef(), wx.NewIdRef(), wx.NewIdRef(), wx.NewIdRef()]
+			self.toggle_list = [wx.NewIdRef() for i in range(6)]
 		
 		if wx.VERSION_STRING < '2.9':
 			self.tools = [  toolbar.AddTool(Menu.ID_SAVE, wx.Bitmap(os.path.join(ICON_PATH,'save.png')), shortHelpString=_('Save File') ,longHelpString=_('Save the current diagram'), clientData=self.canvas),
@@ -155,7 +162,6 @@ def __init__(self, parent=None, ID=wx.NewIdRef(), title="", diagram=None, name="
 			ID_DOWNWARD = self.toggle_list[5]
 
 			if wx.VERSION_STRING < '2.9':
-    				
 				self.tools.append(toolbar.AddTool(ID_DOWNWARD, wx.Bitmap(os.path.join(ICON_PATH,'downward.png')), shortHelpString=_('Downward rules'), longHelpString=_('Define Downward rules atomic model')))
 				self.tools.append(toolbar.AddTool(ID_UPWARD, wx.Bitmap(os.path.join(ICON_PATH,'upward.png')), shortHelpString=_('Upward rules'), longHelpString=_('Define Upward rules atomic model')))
 			else:
@@ -213,10 +219,18 @@ def __binding(self):
 		self.Bind(wx.EVT_TOOL, self.OnSaveAsFile, id=Menu.ID_SAVEAS)
 		self.Bind(wx.EVT_CLOSE, self.OnClose)
 
+	def OnStayOnTop(self, event):
+		"""
+		"""
+
+		if self.GetWindowStyle()==self.default_style:
+			self.SetWindowStyle(wx.CLIP_CHILDREN | wx.STAY_ON_TOP)
+		else:
+			self.SetWindowStyle(self.default_style)
+
 	def OnSaveFile(self, event):
 		""" Save button has been clicked
 		"""
-
 		### OnSaveFile of the mainW is activated
 		mainW = wx.GetApp().GetTopWindow()
 		mainW.OnSaveFile(event)
@@ -283,7 +297,6 @@ def OnInit(self):
 
 		import gettext
 
-
 		#builtins.__dict__['PYDEVS_SIM_STRATEGY_DICT'] = {'original':'SimStrategy1', 'bag-based':'SimStrategy2', 'direct-coupling':'SimStrategy3'}
 		#builtins.__dict__['PYPDEVS_SIM_STRATEGY_DICT'] = {'original':'SimStrategy4', 'distributed':'SimStrategy5', 'parallel':'SimStrategy6'}
 
@@ -302,6 +315,5 @@ def OnQuit(self, event):
 		self.Close()
 
 if __name__ == '__main__':
-
 	app = TestApp(0)
 	app.MainLoop()
\ No newline at end of file
diff --git a/Menu.py b/Menu.py
index bf9c5341..702bd3a1 100644
--- a/Menu.py
+++ b/Menu.py
@@ -140,6 +140,9 @@
 # Experiment 
 ID_GEN_EXPERIMENT = wx.NewIdRef()
 
+# Stay on top
+ID_STAY_ON_TOP = wx.NewIdRef()
+
 # Library popup menu identifiers
 ID_NEW_LIB = wx.NewIdRef()
 ID_IMPORT_LIB = wx.NewIdRef()
@@ -825,7 +828,7 @@ def __init__(self, parent):
 		add_constants.SetBitmap(wx.Bitmap(os.path.join(ICON_PATH_16_16,'properties.png')))
 		preview_dia.SetBitmap(wx.Bitmap(os.path.join(ICON_PATH_16_16,'print-preview.png')))
 		generate_experiment.SetBitmap(wx.Bitmap(os.path.join(ICON_PATH_16_16,'generation.png')))
-
+	
 		AppendItem = self.AppendItem if wx.VERSION_STRING < '4.0' else self.Append
 
 		### append items
@@ -836,7 +839,19 @@ def __init__(self, parent):
 		AppendItem(preview_dia)
 		AppendItem(generate_experiment)
 
-		self.Enable(ID_PASTE_SHAPE, not Container.clipboard == [])
+		### Stay on top always for the detached frame (not for diagram into devsimpy as tab of notebook)
+		if isinstance(self.parent.parent, wx.Frame):
+			if self.parent.parent.GetWindowStyle() == self.parent.parent.default_style:
+				stay_on_top = wx.MenuItem(self, ID_STAY_ON_TOP, _('Enable stay on top'), _('Coupled model frame stay on top'))
+				stay_on_top.SetBitmap(wx.Bitmap(os.path.join(ICON_PATH_16_16,'pin_out.png')))
+			else:
+				stay_on_top = wx.MenuItem(self, ID_STAY_ON_TOP, _('Disable stay on top'), _('Coupled model frame not stay on top'))
+				stay_on_top.SetBitmap(wx.Bitmap(os.path.join(ICON_PATH_16_16,'pin_in.png')))
+
+			AppendItem(stay_on_top)
+			parent.Bind(wx.EVT_MENU, parent.parent.OnStayOnTop, id=ID_STAY_ON_TOP)
+
+		self.Enable(ID_PASTE_SHAPE, Container.clipboard != [])
 
 		### binding
 		parent.Bind(wx.EVT_MENU, parent.OnNewModel, id=ID_NEW_SHAPE)
@@ -845,7 +860,6 @@ def __init__(self, parent):
 		parent.Bind(wx.EVT_MENU, parent.diagram.OnAddConstants, id=ID_ADD_CONSTANTS)
 		parent.Bind(wx.EVT_MENU, parent.parent.PrintPreview, id=ID_PREVIEW_PRINT)
 		parent.Bind(wx.EVT_MENU, ExperimentGenerator(os.path.join(HOME_PATH,'out')).OnExperiment, id=ID_GEN_EXPERIMENT)
-
 class ShapePopupMenu(wx.Menu):
 	""" Shape menu class
 	"""
diff --git a/icons/16x16/pin_in.png b/icons/16x16/pin_in.png
new file mode 100644
index 00000000..d5c4f390
Binary files /dev/null and b/icons/16x16/pin_in.png differ
diff --git a/icons/16x16/pin_out.png b/icons/16x16/pin_out.png
new file mode 100644
index 00000000..ec2a0f26
Binary files /dev/null and b/icons/16x16/pin_out.png differ
diff --git a/icons/pin_in.png b/icons/pin_in.png
new file mode 100644
index 00000000..14cb32be
Binary files /dev/null and b/icons/pin_in.png differ
diff --git a/icons/pin_out.png b/icons/pin_out.png
new file mode 100644
index 00000000..7b0f8935
Binary files /dev/null and b/icons/pin_out.png differ