Merging Models Together?

Hello!

I am working on a SWEP on request for someone. I am making the Ambassador into a SWEP. Instead of v_models, there are models called c_models, and they are problematic. Lua recognises them, and they do show up but they aren’t shown quite right. Halfway though the thread, user Altimor told me to merge the c_models ‘c_spy_arms’ and ‘c_ambassador’. How do I merge models?

Thanks,
Marlwolf

Sorry if that was a bit rambling. Here is the original thread:
http://www.facepunch.com/showthread.php?t=809917