If you don't know what to do with this - read this:
http://www.angelfire.com/tv2/stm/installguide.html

For the handling.cfg and default.ide lines, just copy the ones for the 'voodoo' into the place of the 'police'. For the wheels used in the screenshots, simply download my XBox wheels mod and change the wheels size under 'voodoo' in the default.ide to '0.73'

Oh and so you have the right colliosion file, place the vehicles.col file in models/coll. :)