If your talking about the head your going to use then you need to save the mdl and mdx file of the head your going to use as well as the tga. Then you need NWNplug-in for gmax and MDLops. With MDLops you need to convert it to an ascii format? I think thats what it called and then with the NWNplug-in for gmax click on MDL loading and find the acsii and click import. That should get the head model into gmax. from there you will have to make the eyepatch model from scratch.
I am not sure where it is but I do know Oldfalsh had a small tutorial in the Seven of Nine modding request forum and that tutorial should help you accomplish getting the eyepatch to work :)
I hope this little bit of rambling helped in some way :lol:
Eefluxx
MOTS check out this thread and it might help you out
http://www.lucasforums.com/showthread.php?t=180673)