If you have standard Cruise Control via MFSW then you just need to do the following.
1. Replace your current buttons with one of these:
7E0959442A (support DSG paddle shift)
or
6C0959442B (don't support DSG paddle shift)
2. Exchange your radar for another one (with correct SWAP code already uploaded).
3. Adjust your ECU & ABS coding (VCDS, OBD11, VCP, etc.)
4. Enjoy ACC