FLAC and Musicmatch

At present I own a stereo that connects directly to my computer through USB. It came with a driver and Musicmatch. Bacially you connect your computer to the stereo through USB. You then install Musicmatch and the Driver. You put all your tracks in Musicmatch. You can then skip tracks etc through the remote on the stereo.

My only problem is that I can’t seem to find a FLAC plugin for Musicmatch.
Is there one and how do I get my FLAC collection working with Musicmatch?