In the pcpcache folder are 11 files for ervery Unit texture, named with letters from A to K , for every player color in ee2. The 11 is black for the world player i think. Nifscope can export pcpatch files to tga, but the tga has no colors more. Mostly have the files a high from 1 and with from round 10000 pixels. So, i think that is a color table. Nifscope say, the the pcpatch files are NiPixelData (unknown 8-bit 1-dimensional textures?). The game loads as replacement tga grafic files, but it bugs. No wonder, if no right stuff in there.
Can a user say more over this files? I think, the only hope is that the niftools delevoper update his program, so that we can export that better to a tga. But, the texture bug are not so bad. I was only too much a perfectionist.
