Okay, so the hack to integrate my phpBB2 into phpNuke looks easy to do, but the problem is that I already have 370+ users. Will the old users be automatically ported into the Nuke stuff as well?

yes, the users will be transferred and they will become a combination nuke/phpBB user since the 2 would then be combined

You will have to have a running version of NUke 6.0 and then integrate the phpBB port from Toms' site as your Forums. You will then need to run the importer script if you are using the original phpBB forums. Otherwise, if you are only using Nuke now, then all you need to do is install the Forums. IF you are using the Splatt forums, I beleive there is an importer for that as well. All can be found at Tom's Site

mikem