Best free Forum Software (and help installing it).

My friends are off to college now (as am I) and we thought it'd be cool to set up a forum to keep in contact on. I currently run Vbulletin 2.3.2 on my car website (http://www.exoticcarforums.com)- but don't want to pay for another set of forums...

So my question:

What is the best free forum software?

Can anyone help me set it up on my server- in exhange for free advertising on my 2,000,000+ hits car website.

 

I dont know how to install it, but PHPbb is pretty popular. I am sure that it is easy to install though, something you could do yourself.

 

I ended up using the "Invision Power Board" and it's great! It's extremely simple to use as well as very professional looking. Check it out:

http://www.highschoolfriends.org

(please don't sign up, for kids from my town only (as of now)

 

ur all goin against vbulliten

 

vBulletin isn't free.

 

yup i know that

 

i also recommend phpbb
its very basic but free and easy to install
i suppose i could help you install it