p72 hondata s200 upgrade help

i own a 1994 honda eg and has a mini me swap. my p28 blow up on me. no i payed 150 for a p72 with hondata and nobody really messes with those anymore. so how hard is it to upgrade to a s300 if i allready have 200 please help. by the way i live in dallas texas so if anybody knows somebody that tunes s200 let me know.