You can set a tag on the end of the models example : hunter_zombie_rz.mdl
Or you can create your own file and then inside place models.
Originally Posted by Just4Games
You have to change the name of the model you edited.
If you have a model on your server (edited one) and a player has the same model (same name), his client will pretend that the model it's already downloaded and pass it.
You are faster... :/