Nintendo ds

mate read the other posts before asking questions.

Im not sure about playing a ds game, i very much doubt you will be able to get an emulator.

And yes, you can only play GTA if you have the UMD and are running 2.00 or higher

Ok. There is no way to play DS games on the PSP. You can only play GTA on 2.0+(what flaime said). And fastloader will only load ISOs on a 1.5!