Check out AndrewJ's Alternator kill switch in his thread about his Honda here for ideas:
Post #149, 5th generation Civic hatchback
Hope that helps.
AndrewJ is one of the most ambitious people on this forum, as far as modifications go, (so are basjoos, MetroMPG, and bbjsw10, just to name a few) So check around and they will provide all the ideas you can handle.