Thanks for the advice.

I renamed the file mercury.arf but the receiver would not boot. I then used Frank van Gestel's Tarmerge that seems to combine the mercury.arf with a hacked version. I'm not exactly sure why this was needed but it seemed to make Rioplay work (as well as display server).

After I got Rioplay to work, I realized that I have a lot of WMA files. Too bad Rioplay doesn't seem to play them, the shoutcast is pretty cool.

Thanks again for responding.