How to make wp-signup.php a 1-step process

I’m developing a multisite for Real Estate agents. Wp-signup.php used the wrong page template from my theme (homepage instead of full width page template), so I took the meat and potatoes from wp-signup.php and created a page template out of it.

Here’s the result: [http://thewebrockstar.com/realestate/signup/][1]

However now step 2 (after you hit Next) redirects away from my wp-signup page template to the original wp-signup.php.

Is there a solution to this? I was thinking it would be easiest to make wp-signup.php a 1-step process (everything on a single page) instead of this:
http://i.stack.imgur.com/PTP74.jpg