Do you have a PSP, version 1.5?
It's VERY easy to do...just read the instructions. Remember, you have to install the emulator with this program:
EMU installer
1.5 USERS:
1. Download this file located at
http://files.pspupdates.com/cgi-bin/...0,1,0,0,38,469
2. It's in Spanish, so what you need to do is download any emulator/homebrew anywhere.
3. Now open the EMULATOR file, and extract the EBOOT.PBP located inside it.
example: NES:
http://psp-news.dcemu.co.uk/nesterjpsp.shtml
4. After installing the file mentioned in step 1, open the program.
5. Where it says "Nombre:" type down whatever you want the emulator/homebrew to be called, this does not effect the game.
6. Where it says "Fichero PBP:", click the "..." button, and locate the EBOOT.PBP file you extracted from step 3.
7. Where it says "Unidad PSP:", make sure your PSP is connected, and select the drive letter of your PSP.
8. After all that is inputted, click the "Generar ficheros" button. wait for it to finish.
9. If this is an emulator, read on, if not, you're ready to play!
10. Download roms for the emulator from any web-site which has them. (DO NOT ASK FOR THEM ON THE FORUMS, if you really need help, ask me. make sure you PM it)
NOTE: I've had alot of PM's asking for "psp roms". there is no such thing, when it comes to emulation, a rom is a rom. Any rom you download will run on the psp, as long as you have the appropriate emulator
11. Put the roms in any folder of the PSP, except GBA, that has special rules.
12. Run the emu on your PSP, select onm the psp whichever folder you put the roms in. Press O to play.
VERY easy and if you still cannot figure it out, ask someone who know about computers.....
As for ROMs, just search google for them.