Actually you guys missed out G-Tech (or similar).
However mapping on a road usually means a generic map with specific modifications or a standard car otherwise it is...
1. Not legal
2. Takes many many hours
3. Not really a proper remap (unless it takes days)...
Nearly all doorstep mapping involves a shabby (you might as well buy a chip...) map.
Anyway this is most likley money sponge so I'll go with the general concensous.
As for the reply from Ziggness, a proper remap needs a rolling road and a real road. A rolling road doesn't cover it unless it happens to have a wind tunnel close by.