User pays before they register?

[dwbroad]

Hi,

I'm administrating a pay-for-access forum on vb 4. The way it works currently is the user registers then they have to click a link to proceed to the payment page, when they pay their usergroup changes so they have access to the forum.

Apparently what needs to happen is they pay before they even register, any ideas how I can do this, so from paypal or whatever they are directed to signup or given a username and password?

Thanks,

David