.bsr files and model textures

Anyone have any idea of how these work? For example with the gold/pink pig there is only one .bms file that both the .ddj textures for each pig share. There are .bmt files for each pig (p_goldpig.bmt and p_goldpigclon.bmt) however only one p_goldpig.bsr (This file references to the .bmt files, .eft and .ban files -- all .efp and ban are referenced as 'goldpig' since they are the animations and particle effects used by both pets, however there is a reference to both .bmt files)

I'm assuming the .bsr and .bms are shared by both pigs, but where is the connection between the p_goldpigclon.ddj file and the p_goldpig_part1.bms and p_goldpig_part1.bms

When I try to open p_goldpig_part1.bms in 3D Model Converter it asks for p_goldpig.ddj but not p_goldpigcon.ddj - the game still has to use this texture for the pink pig.

Any way I can tell the .bms files to look for xx.ddj instead of p_goldpig.ddj ?

Edit: So I see that in the .pk2 files the chardata_#.txt files link to the .bsr file which the .bsr file links to the .bmt files, which .bmt files link to the .ddj files, any way I can edit the .bsr and not fuck it up?

I guess I just have to add the line prim/mtrl/cos/newbmtfile.bmt but where?

You can see them in here:
http://i41.tinypic.com/2128g46.png

I already added a new .bmt file in there, however not sure if placed it in the right spot, enough 00s in between, etc.