hehehe. ok, heres the break down
put the model you want to take apart in a folder so its more organized. open up milkshape and goto
Tools->Halif-life->decompile model
after you decompile it, goto
File->import->smd
find the ref file of the model, most likely it has the same name as the model.
And now you have the model ready for editing in ms3d
I hope that helped