At present, if you want to go for a MAP-based (speed-density) system on the Zed, you need to go for an aftermarket solution. I'm not sure it would be worth the large amount of plumbing involved to fit a sequential set-up on any V engine to be honest. You need exhaust gas from all 6 cylinders, plus various bypass valves to divert exhaust flow.
As for mapping, there's no difference in method between single, parallel or sequential set ups. Generally-speaking where timing is concerned, you would have the most advance in the low to mid-range areas on the big single, and the least amount of timing for the quick-spooling twin sequential. Very generally-speaking. Not 100% sure what you mean though mate.