ButtonHack
Features:
* Edits the registry to swap the X and O buttons for use in the XMB.
So instead of X being enter, O becomes enter and X becomes back.
* Should work on all custom firmware
* Works on 6.20 TN-A (HEN) and the change even remains in effect after
the PSP has been shut down and the PSP reverts back to 6.20 OFW.
* Easy to use.