A Gmax tutorial on how to create skinmeshes using "envelopes" in Gmax.
I've not created this tutorial - so no credits for me! It's originally from http://phobiagames.150m.com/gmaxtutorial6d.html
Sadly, the site is down. Luckily, I pasted the whole content into a text document back then. Decided to upload it here.
These links might be helpfull, if you want to do it via "painting weights" in Gmax. Though written for NWN2-models, the general techique is the same:
http://neverwintervault.org/article/tutorial/gmax-beginners-guide-riggin...
http://neverwintervault.org/article/tutorial/weightingrigging-nwn2-body-...