short answer you will have to put in megasquirt unless you build a plenum for the MAF sensor and IAT to sit in. And it's been almost 10years since I have been under the hood of a zetec contour but that might cause clearence issues with the firewall.
If you are dead set on buiding this go to Teamzx2, Focaljet, and Focusfanatics and read up on ITB builds that have been done on the Zetec and see what hurdles had to be overcome. I am not saying you can't or won't be able to but it might be a bit harder than one thinks.