Hi everyone...got myself a little problem

My car is 1998 Escort and has coded ignition keys...

I intend to do a engine swap from 1.6 to 2.0 zetec engine.

Yesterday i connect the mondeo 2.0 EEC-IV to see if my car will start, and it didnt (the LED is flahing fast under the clock)...so thats got something to do with coded keys;

The 2.0 ECU is TAXI, and mine 1.6 ECU is DESK...so they have both internal PATS?
So is the solution, just to get the mondeo red keys and re-program my coded keys?

It is obviously, that 2.0 zetec wont worky properly with 1.6 EEC-IV.

Cheers for the answers!