As far as 'right's and 'ownership'... I did most of the work on SitH, but there were several others that contributed significantly... They're all listed at the bottom of the SitH Manual. TychoMax, the guy who did MaraMyth, is included in that, as we did share some of our work with each other. As far as I'm concerned, you, and anyone else for that matter, is welcome to do whatever you want with SitH, provided all the original credited contributers (from the manual) are credited wherever you include it.
I wish I did, but I surely don't have any of this anymore. I've got plans for this saturday night, gunna be playing some Mazz with some of my old friends in #CP#. If you guys are still around after that, I'll poke my head in. Thanks
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EDIT: And yeah, feel free to ask me any questions about it. Marathon is still my favorite game series, for sure. Just as Myth is an incredibly old game, but worth playing still because it's so fun, Marathon is as well. I believe marathon.bungie.org has all 3 games ported to OSX/Vista, free, give them some playtime.
![Smile :)](./images/smilies/icon_smile.gif)