All software comes with a auto installer nic. That's the reason they are so heavily used, they were made to be used by everyone :)
It's been years, and not sure I remember correctly, but thinking about it, AJ was a member of vbportal for a while earlier, and vpf was a test site for it if I remember correctly. The sad thing is I wonder if they ever changed it over to the finished version or not. The Portals are all the same really, some better than others, they all look like PHP-Nuke websites out of the box though. VBPortal was php_nuke, just a shoehorned version (err, still is) so that's why I don't like it. Top heavy, inflexible, a HUGE amount of queries and server resources needed, and being very nuke based, insecure.
I should have been clearer that I was talking about the forum mostly, not the portal., I think your stuck with it now. You won't be able to upgrade the forum, as it's 2.0 specific, I'm not sure you can get a version for the newer series, (I've never even heard of a newer version on the main VB forums, or even any mention of vbportal in years that I can remember) and even if there was, it's still commercial, you would need to pay money for it, and I do know that there are free portals out there far better, at least from my viewpoint. The thing is the database that it uses. There's no way to translate the database to another system automatically that I know of. The forum would be okay, but the database that contains the portal, such as the link, dl and other specialized modules may not work at all, unless you manually rewrite and rename the database tables to match the new system, something I would recommend not to do unless you really know what you are doing.
As to what John just said, he would know, and so would I. When JPH was gone, I had to come in and help him fix quite a few things that he (and as politely as possible in putting it) buggered up. As easy as PostNuke is, it's still requires some knowledge at least, and if you ever saw the VBulletin admin control panel, you would see just how insanely complex these things actually are. It took me 10 minutes to install the new version of VB, it's taken me 3 weeks to get it to work the way I want it to work.