Noob friendly notice, please read! My comp has been down for quite some time, so i am not very active on this forum, I however still get pms from people all the time asking me if i can help them hack there psps. Look, I dont want to be rude or anything, but here is what you need to search for,
pandoras battery, and
magic memory stick. Search for those 2 things and you will find out everything you need to about hacking the psp, it is quite simple...so, in conclusion.....SEARCH!!!!
oh, and you do need to have hacked, or cfw (custom firmware) to run emulators.
A lot of slim psp owners have been on lately with emulator problems...believe it or not I was in your shoes last week. The answer to your problems is that you need 3.xx compatible emulators...the fat guys can get away with the 1.50 emulators because...well, we slim owners cant run 1.5...hence why we need 3.xx compatible emulators...anyways here is a link to a 3.xx emulator pack, it comes with prolly every emulator you could want...and they work for the psp. Except the n64 emulator works poorly...hahha!!!
3xx_Emu_pack.rar - FileFront.com
I mostly play nes, snes, and gba games on my psp....oh man...so many nintendo titles on a sony system is scary.