Originally Posted by TheDoc

You can't change the signup.php file, its encoded... If you want to not use it, then that's fine, but all values must be passed (still goes thought he join form) If you try to hardcode the join page with a nats id, it will be ignored. From the tours to the join page, the ?nats= is nothing more than a pretty thing that makes webmasters happy. All tracking is already done, and will be picked up on the backside.

But that's a cool idea either way, may have pulled out a way to show off different join pages based on the webmaster id, without the webmaster having to do anything... neat.