Final Fantasy Hacktics

Hi. Is there a way to keep characters at level 1? I wanted to have a bit of fun and unlock all the jobs to skip the grind but it makes the game too easy so I thought it might be more interesting to beat the game at first level, maybe that would balance things a bit? The only idea I had was using cheat engine to freeze exp, but I don't know if that would even work. Maybe someone else already did something like that?
I tried to search forums but failed. Sorry if there was an answer but I couldn't figure out how to put my question better.
Thanks! =)