I have actually looked into supercharing my R32. I checked with Z-engineering, which I believe is quite a good supercharger.
They told me that it is possible to use the V6 supercharger in the R32, but that they would have to remap the ECU. However they have not done this before and it would cost a fortune as they do not have any examples of other ECUs.
Basically, the entire installation would cost about 10'000 Swiss francs and the supercharger could not be run at full power (.3 bar) instead of the normal .4 or .5 bar with the V6 engine. So I am thinking about it, but am not yet sure, as it is a little steep. However it would increase the output from 240 to about 310 horses. Which is far beyond what I really need.