I don't know of anything for "converting", but you can use the audio editor feature of Blaze Media Pro to record audio from anything you can play or hear on your PC, including FLAC files. Simply play them in your normal player, and record at the same time. If you're interested, there's also a beta version with a specialized audio recorder feature you could use to record in batch mode (since it will split the tracks for you automatically). Let me know if you'd like a link to that version.
http://flac.sourceforge.net/download.html Check the applications there. At least one can definately convert flac to wav (which can be converted to mp3 later) Or you can transcode using foobar (flac->wav is built in, for flac -> mp3 you need to specify an external LAME mp3 encoder in the Settins panel)
All right, thank you guys. I actually ended up just using a winamp plugin that plays the music files. I'm not going to convert them because I think I'm going to delete them.