maintaining 2 logins and databases with vBulletin

[mytown.ie]

OK, i just want to make sure I understand this correctly.

You guys think that they best solution is to add all the required fields to the vBulletin db user table. Then drop my current user db table and move all my sites current login/register/user_account code to look at the vBulletin user db table.

Another question then. If a user logs in to vBulletin forum on my site, I also want them to be logged in to the main area of my site. What changes to code will I have to make to achieve this? Can you advise me of what code/files need to be edited?

Thanks,
Garry