a ps3 exclusive would be complete bullshit (seing as I just bought a 360). i don't think Rockstar would be that retarted. if only someone pulled their thumb out of their ass and allowed content to be run from a hard drive. Then you could install the main files to the hdd and have one disk in the drive. Although, seeing as I only have a 20gb hard drive, I'd kinda be fucked.
if you have all that info compressed, you'll be awiting a day for it to uncompress