If your location is using the NEC 2002 with no additional requirements that would disallow this then NM cables can be used if installed in accordance to 300.4(B)1 which requires listed grommets or bushings.
#86114 - 09/13/0301:59 PMRe: Conduit for Metal Stud-Work
I am not familiar with California's code, I know that some changes have come about. But check to see if they allow NM cable installed. If so follow the lead of Shane. I was recently in Orange County California and there was an all metal building going up. They were using EMT, I took pictures. I will try to send these in so you can see.
#86115 - 09/16/0310:23 AMRe: Conduit for Metal Stud-Work
Thank you, gentlemen. Your help is greatly appreciated.
I think I'm going to try and squeeze metal conduit into the budget (or out of the client) just because I'll be much more comfortable with the install. Being that the vast majority of my experience is in commercial, I've never been a big fan of NM anyway.
BTW, this job happens to be in Laguna Beach (in Orange County, CA)