I've been using a combination of XMplay and Winamp plugin.
I set Winamp to Disk writer output.. the only catch is, you have to remember to switch it back otherwise next time you try and play a song, it will write it to disk.
I found one feature of xmplay remakably handy: you can disk-write each instrument to separate files. You can then easily import your old MODs into your favourite DAW, track-wise, and remaster them