http://www.megafileupload.com/en/file/5 ... k-map.html
Copy to your 3d/courses/York folder, back up your York.map file and re-name this one

Put this in your courses.dat file:-
CATAG:cc_flatTurf3 ***************************
York
DistLimit:7
LL186
F,16
NULL
and change any 7F showcase race to use York:cc_flatTurf3

Not sure but you may have to go into the racecourse editor and load the file in and export it