Closing the accounts in and of itself will not boost your score. In fact, it could lower it.
As lando said, when you close those accounts, the CLs no longer factor into your util for scoring purposes. If you have one account reporting a balance of $800 on a $1000 CL, and close three other accounts reporting $0 out of $1000 CLs, your overall utilization will go from 20 percent to 80 percent, and will tank your scores significantly.
Welcome to the forums!
Message Edited by FretlessMayhem on 07-23-2008 02:36 PM