Need Help On PSP

I Need To Downgrade My psp To Play ISO files can anybody help me?

Thanx

So... ???

Whats your Psp Version?

Last I checked, you can downgrade 2.71, 2.80, and 3.0. Search google for PSP downgrader or PSPupdates is the site I check. Make sure the downgrader corresponds with your firmware and PSP mobo version.

Check this site: http://www.psp-hacks.com/

You can downgrade from ver. 3 and below. GL!