How to make a custom model use an in-game portrait

[Night Mare]

I've made a model based on the Blood Mage, and in game the place where the portrait should go flashes between different colors on the model (usually red, dark red, gold or tan). It's always a solid color. Will using a custom path that imitates the original Blood Mage model work? Are there other ways? (I'd like to be able to use my edited blood mage and the regular mage on the same map).

 

[wugiboy]

name it exactly as the original model(the model that you want replaced) when you import it

 

[Night Mare]

Ok, thanks!