Help and/or Advice needed!!!!

Hi,

I have recently downloaded some game files to play on my psp the files are in the cso format.

Do I have to downgrade my PSP? The version of software is 5.01. What's the best way to go about downgrading.

Anyhelp would be great.

Many Thanks,

Kritter86

you need to downgrade your psp i recommedend that you use psp pandora deluxe and a good guide from this forum site