VS2012, Add-In: How to add a Solution Explorer context menu-item?

Hi,

I need to create a new menu-item on the Solution Explorer right-click context menu. And I need to currently selected item (folder or file) path.

I have used MZ-Tools pages with success until now (adding menu-item to code context menu), but I can't seem to find the Solution Explorer context menu. The commandBars contains the "Project and Solution Context Menus" but nothing happens if I add to this menu.

Any hints on how to achieve this? How to reference the correct menu and how to get the selected item?

--
Werner