Creating a bridge/module for application

[mlotziii]

I am looking to create a bridge between vBulletin and a script that I have on my site called gPix. To see what I am talking about go to http://www.charmcitytalk.com and look at the vBadvanced module called Pixels.

You'll see on the top right corner it requests the visitor to login or create and account. I would like to use vBulletin's user authentication for this. I think I just need to link the tables some how ... or do a find replace. Is this something I can do?

If someone can help me with what I need to look for that would be great! I can probably handle the coding.