I see that this is an old post. However, BnB and PT both are working fine on my install of Mint 17.3 (XFCE). Just install as normal using wine and then start Qsynth before you start BnB or PT. Point BnB to Qsynth for midi. The midi files will work fine using whatever soundfont you choose in Qsynth, but the "Realtracks" won't work. No loss as far as I am concerned. Actually an older version of BnB works better and is easier to use than the latest version.