It's really complicated mate, I wouldn't bother....
You have to unscrew the 4 bolts in the subframe, then remove old seats (I do it through the boot with the back seats down to prevent scratching the arches or damaging the doors.
Then put the RS4 seats in and put the screws back in. That's it.
You may have a small nubbin on the bottom of the subframe, but with a couple of minutes with a mini hacksaw it's off.
Wiring the seats up isn't the easiest though, but most garages should have someone available who can do it for you.