i m using psp 3000 cfw 6.35 A2 . a good guy who must b realy aware of all datstuff, advised me 2 use pro b5.but when i trieD TO do it after running it for installation ,, my screen went black my heart was pounding like oops i messed it up ,after 4 5 min ,i turn it off by taking out battery and i th ought ibricked it , but luckily it was safe and ididnt dare again ,dont know how to upgrade again 2ND whenever iplay gotube iget ablack screen and java script error