Or you could use skinmod.dll...
But from the fgd:
Code:
replacement_model(string) : "Replacement model"
replacement_model_body(integer) : "Replacement model Body setting"
replacement_model_skin(integer) : "Replacement model Skin setting"
replacement_model_flags(choices) : "Replacement model Flags" : 0 =
Note that 'replacement_model_skin' is an integer.