http://www.youtube.com/watch?v=ykW3u9ZmmrI - Video Tutorial I made on how to downgrade from 6.20 a while back. A few users have tested it on 6.30-6.31 and it worked fine Anyway this tutorial is mainly geared towards noobies. It's not professionally done or anything lol but I don't mind criticism
If it helps leave a comment
P.S. Alot of peeps tend to have trouble with getting the pandora menu to show. Usually this is because of the size of memory stick for some reason. It seems that *sometimes* if the memory stick is larger than 2gb it can cause troubles. I'm still unsure as to why this is but most times it can be solved just by using a different ms.