Want Toolbar that Incororates 2 Folders

I would like the ability to have a toolbar incorporate 2 folders.

For example, the Windows desktop shown for any user actually derives from at least 2 folders:

c:\users\[username]\desktop
c:\users\public\public desktop

I want one toolbar to incorporate all items from both of those folders.

Yes, I could make 2 toolbars: one for each folder. But then the items within each toolbar would sort separately. I want them to sort together.

Thanks.