vBulletin Auth for Different Page

[EvilGenius]

Hi,

I've got a bit of a complex question.

- vBulletin Authentication
- Certain User Group like VIPs.
- A Different Page (more like a private site on another domain)

Now, the goal is to either use iframe or somehow embed the other site for VIP Members usage, but it can't be in a post. has to be a full page.

or somehow filter out that user is VIP and give him access to the private site upon entering his details.

the private site cannot even be viewed by a non-vip. (thats easy can be done with .htaccess referrer)

any ideas...