> In XCC AV player, it won't let me set directories.
> the button to do so is grayed out.
> Also, for a single mix file, thememd.mix(straight from YR cd) it doesn't display names for the wav files. Is this because of some problem or do they just have id numbers?

You need to use XCC Mixer to set dirs. Do you have the latest versions of XCC AV Player and XCC Mixer?