[Blue Moose Aaron]

So you're saying you want to have your main site index, then have a site index for vB using vBa? You could do one of two things:

1.) you can place the vBadvanced index in your forums folder and change your forums index name to forum.php (and update the script name in your admin cp)

2.) you could use the vBadvanced index as your main index but choose in the vBadvanced admin options choose to only allow members to see the forum content.

Hope this helps