essalamo 3alikom ... im a little confused now bcs i've changed my psp fat from 5.03 to 5.00m33-4 but i've heard lately that my new costum can't read the psone eboot and i can't imagine my psp without it... so the question here is ..can i change it now from 5.00 m33-4 to 3.90 m33-3 knowing that when i've checked out my karnel i found it on 5.xx ...and that i have windows xp not vista ... so please anyone i really need help cause all is missed up with me thanks and sorry for bothering u with my poor english cause i dont have an arab keyboard .take care ..peace