What would be the best way to format a 320GB disk in FAT32 without loosing space? I guess with partitioning, only thing is that I don't know if the PS3 recognizes all the partitions. I want to put my games on it, as it's still not possible to use PS3's internal disk, I have a 320GB one.

I don't have a spare external disk anymore, and anyway, all of the disks will be limited when using FAT32.