Final Fantasy Hacktics

I got used to O=Confirm and X=Cancel, I mean that's how the original FFT was and I got used to it, can this be changed in WOTL?
I know you can do this with your CFW and swap the PSP's system control using registry hacks in the CFW menu, is there same thing like this for WOTL?

You could use RemaPSP and then edit the help files in FFTactext. I can't think of any other way, as I don't think there's any ASM hack to do that, plus I don't think ASM hacks are compatible with the PSP anyway.