Here is another release from iamalinuxfreak:

my name is imalinuxfreak, (i am a linux freak), i just recently write a psp version changer + flasher, so take a look, its a very stable flasher. the flasher part is based on uFlash’s code. p.s. READ THE README!!! failing to do so may brick ur psp!

http://imalinuxfreak.url-go.com/