MS3 , Multiport & turbo build

Can you share more about your ignition?
Correct any of this if it's wrong I want to make sure I understnad - the MegaSquirt takes place of the distributor and controls spark to each of the cylinders and timing, as well as when fuel is injected.
How are you mounting coils and wiring it?
How does the MegaSquirt track what's happening in the engine?
Does anything go in place of the distributor to plug the hole or get input?