All good sources here. Hopefully you know how to check some of these. My guess is your ISC isnt dead as it doesnt have an awkward idle, just simply no idle at all. Does the car want to stumble? Will it fire right up? If it fires right up Id say its not ignition related. Have you checked for boost leaks (no really boost if its at idle, but just huge huge leaks in general. A large intake charge pipe leak will cause the car to die.

Just go ahead and post up some symptoms or what you have found thus far and try to test a few of the things we've mentioned. Id imagine we can diagnose it pretty easily.