Hi stasis,
From memory, from what BrakeWest said, the hoses are similar to the 33 GTR. The rear hoses are a pain in the a$$, that's why BW aren't doing them. It involved changing changing some fittings on your car from imperial to metric and was more trouble then its worth. This was all for a 260RS, not sure about the RS4.
For pads, BW don't have anything available for Brembo systems unfortunately. I was using the K750's with my standard GTR brakes, but since i put Brembo's on the car, I've had to settle for EBC's.
Cheers
Mark