easiest thing to do is put a bleed valve on and turn up the fuelling and turbo boost. induction kit will make a big difference aswell.
turboforce in preston, and essex turbochargers do a hybrid turbo conversion for this engine.
see my full how-to guide on modding the 1.8TD here
http://www.percybigun.co.uk/mondeo2/tuning.htm
and there will be a 1.8TD modding guide in next months fastford mag where they used my car for the feature