Yeah, from opening it with a hex editor it is some sort of hashmap for all of these materials. If you open it in a hex or text editor, it is all stored in plaintext to you are able to ctrl+f for the relevant .dds filenames you need to have I guess but knowing the proper format for the .mat files would be nice... for a standalone item though yeah, good luck, I guess you could try and find some unused or test mat and highjack it's material references?