add coregistration option to Forum registration page

[massizero]

Hi,
how can I add coregistration options to the normal registration page of vbulletin?

I want to add those co-registration boxes to my sign up page. Basically, when someone signs up to the forum, he can check some or all of the additional co-registration boxes to signup for their chosen third-party newsletters

Any idea?

Thanks

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any help?