How to replace helicopter in HL2 with a Attack Heli

I want to replace the Combine Helicopter with this Attack Heli.

Is it possible?

Then, How can I do it?

P.S. I’m a noobie modder.

EDIT: And, please, no one say:
“the beta sux who cares about this thread lock it up”

Put the model and materials into your Half Life 2/hl2/ directory.

That wouldn’t work, because to make it work you’d need to re-rig the attack helicopter to use the hl2 helicopter’s skeleton.

The helicopters don’t have skeletons; they have hitboxes.

So, where’s a tutorial?