Question - MDL editing

I have a question. I wanted to remove a part of a model or make it invisible and was not sure how with MDL editing. I cannot simply alpha it out since it uses part of the units outfit.

The model is Admiral Proudmoore and the part to be removed is his hat. Could anyone help me with this problem?

I attached the files so someone could look at them and possibly show me how to remove parts. I only need a brief explanation as at the moment this is the only thing I need removed.

-Fiery

Edit: Another Question. How would someone go about attaching an SFX to a model so that it was actually a part of the model and didn't require triggers to keep it there?