Wow, I desert the forum for a few weeks and come back to find a post with my name in the subject line! Let's just say I've been busy and the only Marathon-related work I've been doing is beta testing an AO conversion of a major scenario - I'm sure no one can guess which one ;^)
Any way, sure, you can use any of my material so long as you cite the source, but keep in mind that a lot of the stuff in the Rubicon Volunteers posts was written by others. You'll find that most of the links and all of the images are now broken, and the entire Rubicon Volunteers site, other than the posts made to the forum, is now gone. I no longer have an EarthLink account since they don't offer real broadband in Detroit. Once Rubicon X is finished, I'll probably do an update to the series and restore the Volunteers site, perhaps on the MarathonRubicon site itself as Scott has offered.
Until then . . .