Here's what I do when I have that problem(too many skill points). Simply leave the level up screen then use the DebugMode to temporarily lower your intellegence and then raise it back up when finished.
Do you use the SetINT command ???
If so, what do you set it to in order for this to work ???
Thanks.
P.S. Sorry for bumping this older thread, I've started playing NWN2 + MOTB once again.