Welcome to stangnet.
Snoop around the '96-'04 subforums. You'll find a good group of gearheads there that'll be able to help you out with pretty much any question you got.
Best thing to do is start a new thread in the general talk section of that subforum. Give them more info about your mustang and post a couple pictures of it. They'll get you headed in the right direction.
Good to have you with us.