Hacking How do GBA games look on the PSP?

[Zeliga]

I always play gba games on my psp. The sound and graphics are ok

 

[Aqua1234]

I, myself is considering getting an EZ-Flash IV ( since there are quite a lot of them laying around in a few websites.) Or a psp, since I wouldn't mind playing gba, gbc, and ps1 games. I currently have a GBA SP, and a DS Lite with an original R4. What should I do? Thanks.