Hi majinmunkee
it is true, the MAX 7 plugin located on my webpage does not work for everyone. Sadly I don't know the reason or solution because I haven't tried it myself, but try to go along these advices:
http://forums.qhimm.com/index.php?topic=4404you should get few of missing DLL's and then it might work.
I'm not familiar with 3DS problem in MAX, maybe you can try to get MilkShape 3D free editor, load 3DS there and resave it to update them, and then try to open them in MAX.
About the models. Lets sumarize it:
.TEX files are FF7 textures. Not common format, not readable, but it can be converted by Biturn and by one of Ficedula's tools. It also gets converted by Biturn when converting whole model.
.P files are FF7 models - 3D geometry. Contains 3D model of one body part, colours and a part of reference to texture file if body part has texture.
.RSD files are present in Field model files. They contain information of which texture and which body parts are together. They point on P files and TEX files.
.HRC files are present in Field model files. They define the model skeleton, they have a list of RSD files which form whole model.
In Battle models (those with better quality) its a little different. Models don't have file extensions so its not easy to know their type, but files which 3rd and 4th letter is 'a' (for example "meaa") are something like .HRC files in field models - they define whole skeleton.
So if you view/convert P file you get one body part. If you open the .HRC or "AA" file you get whole model with skeleton and body parts attached to it.
read also this document for some more details:
http://mirex.mypage.sk/FILES/gamedata.txt