well as the title states, im trying to hack my psp n am needing some serious help.

i recently bought a used psp 2000 and accidently update it to 6.37 ofw.
ive been trying to use pspident to find out if my psp is hackable, but it required me to use chickhen r2 but it doesnt seem to work. so if anybody here have some information, it would be a great help.