If you upgraded your PSP to 2.0 or what everr and your having regrets.. that sucks becuase no one held a gun to yuor head and told you to upgrade.
You cant be pissed off about there not being a Downgrader or what ever...you have 1 out of 2 choices
1. Keep the Psp with Firmware version 1.51 1.52 or 2.0
2. Try to downgrade and Possibly Brick your PSP and Have Nothing to play with...
Just had to get off my Chest..
I have a PSP 1.50 and ther has never been one thought of Upgrading my firmware and there never will be... I would never upgrade for any game