Change wp-signup.php with anti-splog installed

I am trying to change the look of my wp-signup.php page. I have pro-sites with anti-splog installed. My signup page currently displays my homepage theme - which is not what I want. I found some older posts on this, but have not been able to get it working on my site. Here is a link to my signup-page: http://tampasource.com/wp-signup.php