a fiesta si zetec loom works , or use the engine loom from the mondy , and conect the other 10 wires to the xr2 loom not hard really , theres loads of diagrams about on the net , check out www.xrtwo.com theres a zetec room in there , and diagrams showin what wires go were, if i was you i would put the ecu insdie the car behind the dash tho