I am looking for some advice. I had 6.20 TN-D in my Phat 1000 for a long time(over 1yr) and had been working great with all ISO & CSO games. It suddenly stop loading the ISO games in the PSP. Game ICON not showing up. Should I upgrade OFW to 6.35 and install one of the 6.35 CFW? One other thing. I tried to install 620PRO-B8 but the PSP with 6.20 TN-D just rebooted back to 6.20 TN-D when I push x on installation of 620PRO-B8. So seems like I can't install 620PRO-B8 with 6.20 TN-D still on the PSP :(