I have an eBook on how to downgrade from 2.0 to 1.5 with the required applications (downgrader + both firmware). However, I don't know if it works as I don't have a PSP myself. If you are interested, I could send it to you. Also, the legality of this could be dodgy, as I'm sure Sony doesn't want you to do that.
PSP's and Homebrew
Miscellaneous Forums/General Discussion/PSP's and HomebrewThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.