Music now working too. Neat! I think I'm ready to put this out for a bit of beta testing before release.
Still a few non-runners such as Hover Strike and World Tour Racing, but there's a lot running now, so it's probably a good time for a first release.
Added a workaround! Iron Soldier 2 now seems to be working quite reliably, apart from (yet again), audio. It uses straight CD audio and typically does things differently to everyone else...