i had the mad for it plates. i just ground the bolt heads down a bit where they fouled the hubs. get the bleed nipple as the highest point of the caliper when bleeding them or they'll always have air in them and not work 100%
use the mk5 rs2k handbrake cable, but just the rear bit, just take the old rear cable off and swap it with the new one hooking it up to your existing mk4 short cable and halfmoon as mentioned above
3'oclock or 9 o'clock depends on which side of the car you're on, mount them at the rear of the car and everything works fine as long as you have the correct caliper for each side.