Okay, I found this in a forum. The poster said it works, but i am not willing ot harm my psp in any which way. Anyone with like a warrenty should try this out. Okay, you have to have 2.0, then do the downgrade, but instead use this modified 1.5 eboot. I scanned it with Psafep or w/e it is called, and is said nothing suspicious. Also, i am downloading it, and taking it apart to examine if it is a 2.5 update. Well, whoever has the balls to do this, do it.
Heres the link: [LINK REMOVED]