I have the values +/- 0x03 - evidently this is fine with the latest software.

I use the Mode button for a source toggle - just put the values in under KSource. The only slightly annoying thing is that AM seems to come up twice and I'd like to take AUX out of the loop as I have nothing connected to it. Might have to work some IRTranslate magic on it when I get time :-)
Oh, hitting the Mode button also cuts Traffic Announcements off if you decide you don't want to listen to the one that has just interrupted your listening pleasure.

You could also get the Vol. Buttons working faster using IRTranslate I reckon - make one push send 5 pushes to the empeg or something like that.