OK the Kindle Collections plugin works fine even without it being registered, thanks.
Kaysclie, glad you took the plunge and it worked ok for you too! I've waited until I upgraded to a PW2 and not even used my K3 for 6 months before attempting to jailbreak it. Who is the biggest scaredy-cat!
I have now installed KUAL and the font hack, not sure I will make much use of the font hack though, I've tried it and it looks a little different, but fonts aren't a biggie for me (though I do like the few extra fonts you get on the PW)...
All good fun though, and I like that I can see exactly what the battery is at now via one of the KUAL extensions too.