How can I replace BuddyPress Sign up with the Anti-Splog ust_wpsignup_url() ?

The default BuddyPress "sign up" leads to a page where you can signup and create a site on one page with no e-mail verification. I would much rather send a click on the BuddyPress sign up link to the Anti-Splog ust_wpsignup_url() signup path?

I'm attaching a screenshot from http://indienectar.com/. If you click on the "sign up" in the toolbar you will see the BuddyPress signup. If you click on the "Start Here" image you will see the Anti-Splog ust_wpsignup_url() signup page.

I want both buttons to go to the Anti-Splog ust_wpsignup_url() signup page.