well i have done it, and it was fairly easy too
ive opted for 260mm mondeo discs (4 stud) also come on scorpios)
i then got my goodrage front hoses modified with a banjo fitting on the end so they dont foul the cv joint,
then i hammered a sleeve into the calliper to reduce the bolt whole size from 12.2 to 10.2.
now with some high tensile cap head allen bolts m10 i bolted the calliper on with some nylock nuts and anti vibration washers just incace the nylon melts from the nuts,
anyway im just wating for my ebc redstufs to arrive then im going to try to fit the zetec s rear drums i have
but here is a comparison pic (ive posted it on my fiesta rebuild thread but thaught it would also be useful here)
before, 239mm xr2 brakes which are apparently more than adequate for the fiesta,
new. tasty.......