You can't have Perma CFW unless on 6.3X+ without using cipl on a hackable motherboard.2g model is the psp2000.i use a 1g and a 3g,but 1g is not yet supported by pro-online.i never had to even use my cplf on any of the psp's since my psp's can be modded without fail.did you just try and run the update only and not the cplf?
Also you have a wrong idea about the meaning of those ''G's'', they don't mean which revision it is (1000,2000,3000,4000,E1000) but rather it's production wave and which fw it came with (and so the firmware you can downgrade to) a 02g isn't always a 2000.








