Model Swapping basicly is just renaming the files
The only challenge here is to know which file is what.
Heres a quick rundown on the file types:
.dyt.emb
are the color and the shading of a model
.emb
are the alpha textures of a model
.emd
is the 3d model
.esk
is the bone tree which the model is rigged to
.emm
are the materials
.scd
is the physiks of a model (for example long hair or capes)
to actualy swap models compare the 2 files you want to swap
for example when you want to put vegetto over radditz you just rename the files of vegetto to fit the files of radditz and replace them
so to swap a model and textures we need the .dyt.emb, .emb, .emd, and the .emm
for example we switch vegetto bust over radditz
here is how you should rename the files
VTO_000_Bust.dyt.emb ---> RAD_000_Bust.dyt.emb
VTO_000_Bust.emb ---> RAD_000_Bust.emb
VTO_000_Bust.emd ---> RAD_000_Bust.emd
VTO_000_Bust.emm ---> RAD_000_Bust.emm
now put the renamed files in the RAD folder and replace the old files with it
now repack the .cpk and test ingame