Registration Hack
 

I run a site with two different registration services. Our main site uses a custom cold-fusion/mySQL based membership table.

The second table is used by vBulletin.

We want integrated membership and our entire site (with the exception of the BBS) is written in CF (which I know way better than PHP).

Is there a fairly manageable way to hack the vB code to query the main member table rather than the vB table?

I dont think it would be applicable. VB does not interact with user table only when a user logins. There are many instances it compiles/updates data from that table so you need to go through all vb scripts to modify this default behaviour, which would be an arduous job and besides can give you a very unstable vb in return.

If you are planning an integration, my suggestion would be to use vb accounts as your site's main accounts and form your site around vb, not the other way..