Ive read that its doable but i have no idea how
Dashhacks :: PS3-Hacks :: PSFreedom for HTC Droid Incredible
I dont know what roms it works on but it works on virtuous.
Flash it using clockwork
Turn on your incredible
once its booted boot the ps3 pressing the power button and the eject button and after your done with the ps3 reboot to recovery and flash a normal kernel
on a slim uplug the power cord and plug it in before you do the power button and eject thing and if you have a phat flip the switch on the back on and off before you do the power and eject
You'd be better off asking about backed up games on the PS3 forums.
I know that some of the jailbreaks purposefully left out backup loading because the purpose of jailbreaking really isn't to advocate piracy.
Should you still pursue jailbreaking for that purpose, the vanilla jailbreak most likely won't give you the ability to backup games.
And the jailbreak also breaks your ability to use PSN, so it's not like you'd be able to play against your friend anyways.