Change Sign Up Page Redirect on Favorite

Hello,

When someone selects the Favorite link, it redirects the user to the standard GD signup page (oursite.com/?geodir_signup=true&page1=sign_up).

What we need is to change where the Favorite link is pointing to for Sign In and Sign Up. We want to point it to our own sign up page.

How can we do this?

Thanks.

FYI – The reason we need the above is we are using another plugin to register members on our site (we have two WP user roles, and therefore need two registration forms, one for each role).