One way to make them look like a simple folder as in XP is by clicking the "More Options" pull-down arrow (it's located off to the right of "New Folder" and select "small icons" to get a simpler looking, non-aero folder. But sorry, I don't know if there's a way to do this globally, or if you have to do it on each screen you're on.
Hope this helps.
Edited by buttoni, 05 April 2010 - 10:08 PM.
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