How can I download games from eMule to my PSP?
First of all, your psp has to have custom firmware installed but since you said you use isos I will assume it does. You dont need to use isos over csos, they are the same thing, a cso is just an iso that is compressed to save space. The easiest way to get all the folders you need is to go to system settings on your psp and choose format memory stick (dont forget to backup data to your computer). After the format(assuming your psp is hacked) you will have an ISO folder in the root of your memory stick, all isos and csos go in that folder, not game, emulators and ps1 games go in GAME folder. If you want psp games without having to use a p2p file sharer like emule go to any of the links in sources.