I bought a premodded PSP Go for one of my kids that has 6.35 Pro A2. I just bought another go for my other son off ebay that seems to be stock, with 6.10 firmware. I didn't want to update it out of fear I couldn't mod it. I looked at the tutorial and saw instructions on how to mod it if you have 6.20 or 6.30, no 6.10


I downloaded the psp go firmware 6.20 but do not know where to store it to update it. Also, what custom firmware/software should I use on both of these?