user account problem

From: lindsay (hockeplaya18_at_yahoo.com)
Date: 05/21/03 

Date: Wed, 21 May 2003 11:24:59 -0700

I have XP and I accidentally changed my user account on
my computer to be a limited one rather than
administrative. Now I dont know how i can change it
back. There's one other user on my computer but he can't
remember his password so i can't change it from his
account. Help!