Update Access Mask on register

[Token55]

Greetings,

I want to automatically assign an access mask to certain users when they register to use my forums. They're already logged into my site, so I'll reference one of their session variables to determine if the access mask needs to be created. If it does, I want code to kick off when they click the "Complete Registration" button.

I know the 'options' field in the user table has to be updated too.

I think I know the queries to write to accomplish this, I just can't seem to locate the right place to put it in the code. Again, I want it to run right when they click that register button. I'm aware of the use of usergroups, but access masks handle what we're doing better.

Thanks in advance for any help. Let me know if you need to know more...