I need some information about the various custom firmwares. Currently I'm running 5.50 Prom-4 and it mostly covers my needs. I've been looking at an update, but I'm wary of it as I was not the one who initially cracked my PSP, and I have very little idea of what I'm doing with the newer CFWs and how they apply to my hardware. I have a PSP 1000, for starters. I'm looking at 6.20 TN-D for it's permanent option, but I need to know a few things. I don't really use homebrew on my PSP, so homebrew compatibility is not an issue for me. 1.Does it have the same level of PSX game and PSP Iso compatibility as 5.50 prom-4? 2.Can it run current UMDs such as Dissidia 012 like 5.50 prom-4? I own both Dissidia 012 and Third Birthday and both run flawlessly under 5.50 prom-4. I don't have a large memory card and don't want to lose the ability to run them off the UMD. 3.Do I need a Pandora battery and what are the risks of trying to move from 5.50 prom-4 to 6.20 TN-D? 4.Alternately, how does 6.35 Pro-B3 compare and is it a permanent CFW on a PSP 1000? 5.Anything else important I should know?