Help With Member Search

[hobbybox]

im going to be doing a small advertising campaign on my site. I want a link that can list all the members that choose a certain item in one of the custom profile fields. the list reuslts are going to be by state.

i have setup a custom profile field that indicates what st someone is in. I want to setup a link that will list all the members (memberlist) that are in a certain state - im going to do this for all the states.

I just need help as to what I need to call up to get the results im looking for.

this is the link that comes up when I do a Advanced Search by the state field

http://www.mysite.com/forums/memberlist.php?do=getall

It just doesnt give me any clue as to what parameter I need to show the members from the state.