Questions about integration

[foxxcorpintl]

Hi,

My situation is as follows:

I paid a programmer to build a custom section of my website. The section allows for the posting of reviews on a certain type of product, similar to Amazon.com, etc. I have also built a great homepage, logos and everything else. I want to build more of a community than a site for product reviews. This requires a classifieds section and a forum. Currently, users log in with a username and password, handled with SQL tables and PHP. When the user logs in, he hits the landing page from where he can find reviews on products.

THE PROBLEM:
My problem/issue/question is the following:

Can I integrate the existing user login scripting and pages with Vbulletin? Ideally, I want the user to log in from anywhere on the site - classified section, forum or review section, and be logged into everything. I cannot have a situation where the user has to log in to the review section, then wants to post a thread on the forum and have to log in seperately, with a seperate user name and password (or register again if doing this for the first time). Also, I would like everything integrated to one landing page, so users can see their forum posts, classified ads, product reviews all from their landing page.

I am VERY open to ideas / suggestions and I do have some fair knowledge of scripting, PHP and SQL.

Thanks!:D

[CarlitoBrigante]

vBulletin can be integrated with virtually anything. We have integrated it with ClipShare, other video sharing scripts, custom scripts, with CodeIgniter - it is really one of the cleanest forums when it comes to quality of its code, and any decent PHP developer can write an integration for it quite fast.

Most of the code they need to create a login is into vB's files that handle authentication, but you can also search these forums and find plenty of help.