Found it. I'd like to participate please. I'm a little rusty however I have some good notes that might blow the cobwebs out.
I started simple 'modding' by following this old topic from Mush Martin back in 'the day':
http://www.subsim.com/radioroom/showthread.php?t=128825
It helped me learn quite a few things and may help others.
edit:
I have used S3D for editing *.sim & *.dat files a little but am lost beyond that. I 'shiver me timbers' even thinking about nodes but do want to learn more about this powerful tool.