Better wp-signup.php integration

Hey guys,

I did a quick google search but didn't see anything really helpful.

I've got a plugin that allows me to edit/add to the css of wp-signup.php by adding it in wp_head through signup_header. What I'd like to do, however, is be able to make wp-signup.php use a specific page template in my theme. What's the best practice on making this happen and how does one go about it?

Thanks for your time and response.