currently im running 5.03 prom and i wana know if i can use 6.20 CFW on it? yes you can use 6.20 pro on it
is 6.20 better than 6.60?both are nearly identical except that 6.20 is permanent & 6.60 is temporary on psp-3000
if i decide to go to 6.XX can i ever revert back to 5.03?it is possible but there is no reason for you to do that