I'm having the oddest of bugs, my kindle according to the serial number is a PW3 (G090), I successfully jailbroke it (I would assume since KUAL runs fine), but here comes the odd part, as soon as I try to install something with mrinstaller it fails monumentally and misidentifies my kindle as a PW2. Pastebin for reference:
http://pastebin.com/raw/8JztXbpk . So now I'm thinking perhaps I ought to try and fix the mrinstaller script myself but I can't really identify the problem.