You can try limewire.com, but please take note that those site are illegal and those free site are usually contains virus and it will just crash your system.
But you have to think twice if you want to download PSP games from those free site, i.e. limewire for 2 simple reasons,
1. it is illegal
2. those sites are usually contains virus and it will just crash your system.
I will recommend you PSP download site, as a member of this site, you can download unlimited music, video, movie and game with no extra cost. The life-time membership only cost you $35. Once you are the member, you are in the exclusive member area and all PSP games, movie, themes download are freehttp://www.squidoo.com/PSPDownloadSite

limewire, imesh
http://www.limewire.com
http://www.imesh.com
and then convert it to you desired format withhttp://www.mp4-converter.biz/download.ht…

Go to http://my-psp-downloads.info
Goo luck!