It's not in the G3 >> Data >> Save 1~15 folders. That only applies to G1. It is not in My Documents, either-- that only applies to G4 and later.
I remember finding the G2 and G3 saves a couple of times in the past, in some weird place, I just for the life of me cannot remember where.
I really want to back up my save files.
Where on Windows 7 are they located?