I used to know how to do this. This is the picture:
I have two hard drives in a machine, one for OS and programs, second one for data only. I have a shoetcut to the second drive (Drive F:) on my Desktop. Whenever I'm working on a document or want to save an image or whatever from any app, if I hit Save or Save As I get the Save dialog box with a few icons on the left panel (i.e. Desktop, MY Documents, My Computer, etc..) How do I get my shortcut to the second drive to show in that list? It'd save me one or two double-clicks. If I remember wel, there's a Registry tweak that does just that.