I'm using Visual Studio 2010 with some add-ins and extensions. The problem is now that the context menu of the project items in the solution explorer is getting so large that I always have to scroll down for the "Properties" and the "Open in Windows Explorer" which I use most. This is getting very nasty.
Is there a possibility to group commands into a sub menu or to modify the position of the commands in the context menu?
You can always use the keyboard to do the work for you.
The keyboard bindings are set under Tools->Options...->Environment->Keyboard, and the interesting settings in this case are probably View.SolutionExplorer, Project.OpenFolderinWindowsExplorer and View.PropertiesWindow or Project.Properties depending on which propertiy collection you were referring to.
Yes, it can be edited.