I have Wine for such an occasion. I used to make it run Winamp for playing video game music (until AO came along with PSF2 support) and ITunes 6 for making AAC files.
Wine & sound haven't worked together for me in the past... AO doesn't really seem to be made with regular music listening in mind, even apps that were, like Xmms & Audacious don't really look or work like Foobar2000 & Amarok.
soundKonverter is a nice app for making FLACs or whateva outta WAVs.