Forum Moderators: coopster
So, give PHPBB a try if thats your only free option, its nice software. If you have a choice of all 3, then VBulletin Board is my favourite.
dc
Once you get the files loaded on your server its very simple to configure. I highly recommend it and the support on phpbb.com is great. There are a ton of add-ons and things you can do to spice it up.