i guess it depends on what your looking for jon.....
If your talking about the area under my name that has the fancy "become a premium member" and "make sure to vote on ROTM"....you already have the ability to do that. Just go to UserCP towards the top of the page on the black bar and then once you click userCP, click the button on the left that says "edit signature".....
If you want to be able to change the spot that says "member" below your name, and "admin, tech, supporter" under my name, you have to become a premium member. There is only one option for this, it is 12 dollars a year to support the site if you so choose. It is generally done through paypal.....here is the link
http://www.powerstrokeforum.com/forum/payments.php