If you cheat and make a bunch of tomes to raise your ability points, will you still be able to import your character into BG2 or does it check for stuff like that?
No the game does not check for incorrect stats when you import a character, however any tomes that raise your stats cannot make it to through BG2 after importing.
"When I am working on a problem I never think about beauty. I only think about how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." Buckminster Fuller