Anti-Seize is good stuff...used to use it on a MC. It's the opposite of Loc-Tite.

Usually a heli-coil kit is the EASY part of the job. It's getting the broken screw out, esp when the screw is small, and, worse, when it's hardened. I've never used one as small as 8-32, but I have used 6mm many times (again, on motorcycles).