Want to remove Add Solution To Source Control Menu

Hi,

     We are developing a custom project type using MPF. We required customizing the menus/context menus and are able to disable/delete most of them either using CustomFileNode.cs or CustomProjectNode.cs, using querystatus. But i am not able to customize the menus/context menus related to Source Control. Context menu for project/solution as well as File-->Source Control menu are available by default.

For reference, i tried in isolated shell and was able to do it using .pkgundef filr but no luck with the VSpackage we created.

Thanks in Advance

Chinmaya