fedora can allocate all the partitions automagically
though to be on the safe side, i would dump the 'c:/not trash' onto the just in case winXP partition then take it back off once you have upgraded...
failing that, keep all your usuful settings and stuff in the /home directory, and make sure disk druid dosent get its greasey hands on it :P
i recientally reinstalled FC1 foprmatting everything but my old home partition... when i logged in... everything was exactally as i left it... settings, bookmarks, theems... so it should be easy enough.