ProSites wp-signup.php with Membership

Hello,

I'm using Membership, and have set up Multisite with ProSites.

I'm confused how to redo my signup links to keep using Membership along with Prosites.

Membership - my register URL is http://blogsforexpats.com/register/?action=registeruser&subscription=2

and the Login URL is simply http://blogsforexpats.com/login/

I'm using the shortcodes for membership in pages.

Now, with the Multisite and ProSites configured, I need to use wp-signup.php, and don't understand what I need to do.

Do I need to have the user register the current way, then offer them a blog of their own?

BTW - I'm using Membership to offer free downloads to registered members, and get access to the WordPress videos, among other things.

Am I missing something?