is this necessary to get my custom half life 2 character to work? i am having troubles. i edited a character that was already made....when i was done i attached the mesh to the envelopes (they were already there from whoever made the original model...just werent attached)....comiled to smd....and then tried to drag the qc over studiomdl to compile everything including my new smd file. it gave me an error and closed. i searched the threads and came across character studio and was wondering if that is why it wont work (i dont have it). if that isnt the problem....what the hell is it?