go to some site where they have all the firmwares like
www.psphacks.net or something.. then download it then transfer it to the psp in the folder /PSP/GAME/UPDATE/ u must create the folder UPDATE then lay the 2.0 eboot there and run it from the game selection then u'll just do the downgrade :P
__________________

psp 3.40oe-a

psp 1.5 -> 3.40oe-a -> 3.52 M33-4
::Me and butterballer360 on MSN::
DreaDNoughT: How did you come up with that name
Butterballer360: Long story...
DreaDNoughT: I liked dreadnought couse it's said to be a massive destruction weapon
Butterballer360: I have a MASSIVE destructive weapon