If you have to ask then you can't do it sorry!
Passat 4-motion is Quattro, so you'd be trying to do something akin to this: http://www.s2forum.com/forum/s...19402 The motor and generation of Golf is different, but its basically the same longitudinal-engine drivetrain in to a transverse-engine body, which requires re-engineering, well, most of the car.
There is a 2.7T S4-powered Corrado, which again is a similar swap http://www.dubbedbyrma.com/s4rodo_gallery Thats basically a Corrado body attached to an S4 floorpan.
There is also a V8TT Quattro Corrado under way, but the pics of that haven't been published yet.
Oh, and just for good measure, my V8 RWD Corrado:
We really ought to have a sticky for this question, since it comes up about once a week