Pretty well documented on FFOC etc.
There are flash boxes you can order that do 119Kw and 390Nm and thats a very safe tune.
http://www.european-parts.net/catalo...roducts_id=614
There are others by Dreamscience as well as other Uk chip sites.
Capa have contacts with SCT and Dreamscience and had a Focus (2.0L petrol) as a flash mule before. They could push the extra KW out of it with a custom tune.