Is there a FFTPatcher that controls jp multiplier and/or income?
Are you running an emulated version or an actual PSX copy? Failing that, are you using a PSP game?
Emulated: PEC Cheater, your basic GameShark utility. There are codes for maxing out jobs/JP faster.
PSX: Again, GameShark.
PSP: CWCheat I think it's called, but I believe you need a modded PSP and I am not sure of the codes.
Not quite sure what your talking about right there. Could you be more specific? And I'm talking about PSP, if it makes any difference.
http://cwcheat.consoleworld.org/ (http://cwcheat.consoleworld.org/) for PSP, because knowledge is power!
Not sure if the values can be changed using FFTPatcher, but CWCheat might be able to help you out.