What works
I can get everything to install, except Sonicstage: the OpenMG codecs, simple burner, and everything else on the disc installs fine. However this cannot be done through traditional methods, you have to go through the disc and slowly install everything, and in the right order. I did work this out, by doing it through Windows and watching which way everything happens. Simple Burner starts (you have to double-click the icon twice) but I didn't know how to make wine see the audio cd, so that it could be extracted. I also didn't know how to make it recognise the mini disc (even though linux sees it and writes to it fine).

What does not
Sonicstage (the actual program) does not work because it won't install. It dies at 80% with some strange error. Wine reports something about ole32pro.dll. I tried to replace the dll with a native windows version, but I couldn't work out if it was me, or I wasn't using winecfg properly. Nevertheless, it didn't work.

What was not tested
I tested everything.

Additional Comments

If someone, who knows how to operate wine better than myself, can configure wine to make even Simple Burner extract songs to the mini disc, this could solve nearly 100% of problems with Sony Minidisc support on Linux. There is literally no other way to use Sony MiniDiscs without these pieces of software.