Isn't the ACC module in the grille?I don't know. But I believe the radar is expensive shiz, even as a used part. And if I recall correctly, isn't there some windshield equipment like lasers or x ray vision or something also integrated in the adaptive cruise? If that's the case then you need both whatever that module is, as well as a new windshield. Radar also needs calibration (which I can't recall if it's something you can do at home but if not then that's another visit to the dealer).
Best thing to do is email Pavel if the option exists. When you have VDASH running you may be able to scroll through the menu and see what options can be enabled.If I buy a used radar unit and correct steering wheel buttons, is there any way to activate Radar cruise in V-Dash? This is one option I really wish I looked for when I bought my s60 and if I can add it at minimal cost.