most of the Exp cap removers will work with ToB also so that isn't a real problem, if your overpowerd? if you feel like the game is to easy (I got this point were I'm playing at insane and still think ''why does Irenicus live only for like 30 secs.'', note: home-made party)
wasn't this subject overviewd in an other thread?
never mind i'll give you a link with a Exp cap remover to reach level 50 (speaking about overpowerd

)
http://www.sorcerers.net/Games/BG2/BG2_lvl50.zip