Seams like no one gave you an answer. I don't have one because I never tried 7 yet, but have you tried the %temp% system variable ? Try the following: if 7 has a start menu, select Run and type %temp%, this should open you a file browser directly in the temporary folder where you may have a chance to find them if 7 is just a bit like its predecessors.
(after a small research, I found out that the run command is hidden under 7, here's a way to get it back:
http://www.blogsdna.com/2040/how-to-ena ... t-menu.htm)