The Projects collection contains "Project objects"; one for each open project in VS.NET. Each project has property named ProjectItems which is all the project items like the files, folders, sub projects, resources, etc....
I have been reading some posts and blogs by an Extensibility Guru: Chetan Chudasama
And through his info ( all vb.net stuff ) I got a few helper things.
1) Finding the Full Path to the Project of the current Selected Item.
...
Creating Addin's and using ones you download is alot of fun, and very productive....