Okay let's see...Normally LO stores skins in .cdds files, but those skins can be overridden by placing a .bmp or .tga (with the same file name as appears in the .cdds) in bazar/temptextures. No matter where you put the new skin it all begins with a template which is a .psd file that contains separate layers for things like panel lines, weathering, camo/pattern, details etc. The .psd is where the REAL work is in skinning. They are quite laborious to make and my hats off to those who have dedicated the time and effort to make them. Making skins is easy. Making templates is hard.
So if you just sent me your mod that either includes the .bmp/.tga files or a .cdds with the skins (which the skin files can be extracted from), I'd still have to make a template in order to make new skins. Who made the skins originally? Do they not have a template? You might want to get in touch with someone who has made a new model and ask them about the process of making a template from the 3ds max files. I have no idea how that works.