Mike said whta I was trying to say, only much more clear. I would still recommend making some of that filler compound that I mentioned and filling in that crack before you start his precedure. The reason being that by filling in the crack, and effectively glueing with the filler, you elliminate the possibilty of the crack compressing and relaxing underneath your patch. This will prevent cracks in the patch, as well as help prevent the area where the patch adhere to the original bulkhead from failing.
I'm still waiting to here if anyone has some experience with carbon fiber in this sort of repiar, you' couldn't get pre-preg to workin there, but i think you could use tot cloth with epoxy resin. I just started learning to work with carbon cloth a little, and I'm stoked on the idea of using it for everyting I can. A freind built an RC pod glider out of it, and after watching him dive the plane into rocks without incuring any damage to the pod, I'm totally sold on using this stuff. Also, the supply off the stuff that was given to me by an ME proffessor has nearly run out, adn I want to try a larger project, anyonme know where to get some more cloth??