Just about any ecu that you buy will carry a base map to get you running. There is an MS dealer near Bristol that did an ecu and map for £300. Can't remember their name.

But the zetec throttle bodied approach is done by sooooo many kit car peeps there are loadsa maps to choose that will see good power.

I've mapped megasquirt myself and it's really not too hard with a wideband lambda.

Matt