[stingerbtry]

I guess as long as you have 2 extra channels you could run rear door speakers as well although I haven't seen it done on the evo. Wiring etc would be a breeze and you could basically mimic the way the fronts are wired and routed and then run them down the sides, under the rear seat and into the trunk or wherever you have the amp(s). I'm not sure how the imaging would be though unless you added a center channel and did some sort of 6.1 setup with wiring the rear deck speakers as one channel.