You can also try this:
In the cq_monstertype database, search for the monster you want to change the experience and look at the action collumn. This is the action that occurs after the monster is defeated. Put a new acount ID in there then go and make it in the cq_action table and put in the action ID that you put for the monster and then put these other things into the other collumn:
Type = 1518 | Data = 2 | Param = uplevtime += [amount of experience]
Good luck!