Playing iso off of pc (to psp)? Ir Shell?

My question is if (or how) to play psp isos (or .csos, I have FW 3.03 OE-C....high five!) off of my computer. I only have a 1 gig memory card for my psp,its too small, and I want to be able to play my favorite "ripped backups" of my psp games from my computer. (I used USB special system storage to get my games on my cpu). I thought I could do it with IR shell but the readme that came with my version (3.7) seems very confusing, something about usbhosts? Any help would be greatly appreciated.
oh and I have a chubby psp too, lol.

oh and I have a chubby psp too, lol.

I laughed a little, but um I never really understood this either to play the games off the computer, but I never looked into it much. You should probably buy a 2GB memory card, you can get an off-brand one for $35. Christmas is coming up .