http://www.landmarc.co.uk/news.asp?id=24
Here is a link to a UK company that runs a successful set up on a CAT 312 with Quick Hitch.
They use the winch as a Safety wire to anchor mowing machines, but such a set up would be easy to copy and have many applications.
I also have my own 13,000kg line pull Superwinch H30p mounted directly to the frame of a Kubota Kx080.
It is mounted so that the cable can run under the machine (via a bar and sliding guide pulley) to pull either end.
It works absolutely brilliantly and does not seem to have a caused any other issues. It also provides a little extra counterweight for flail mowing which is handy.
Eddie