integration vbulletin

[havomoha]

Hello,

We do have a portal site. And inside the portal, there is a forum written by us.We tought to use vbulletin while building the site but couldn't actualize it because we couldn't do the part of when you log in to site it directly logs in to forum page. We now think that our forum will not be enough for us. We want to use vbulletin. One of my friends said some organizations' site are made by vbulletin.

Now we do have a situation in our forum like that. There are some main titles. They have some sub-titles. And they also have their sub-titles. Can we do that by using vbulletin?
And can you do integration of our script?