Here is a note I got back from them on how to signup.
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Try this link to register.
http://www.pro-touring.com/forum/register.php?
The only mandatory items are a name you want to use, an e-mail address and the image verification to prevent spam robots from registering.
The link you probably used was a link that a member placed the would give them credit for sending you there. Some guys like the recognition of bringing people to the sight. We don't promote it or offer anything for referrals.
Please fill out the form with the link above and you should receive a conformation e-mail to complete your registration. Some times spam filters remove them. If you don't receive yours in a few minutes please let me know
and I will release your account.
Sorry for the hassle and I hope to welcome you to the site soon.
Larry Callahan
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PS:this one works fine
Pantera