Posted: Mon Mar 03, 2008 12:16 pmI believe you need two psps. One homebrew enabled to make the magic stick and battery, and the second is the one you want to downgrade.
you can do it with one psp..but i tinvolvs opening your battery or buyin a datel tool battery(pre modded one)
heres a tut on how to do ithttp://www.pspbrew.com/forum/viewtopic.php?t=11076