Well, the underlying problem turned out to be that after the helper script ran, X tried to start but came back with an error saying that the client's nvidia driver was a newer version than the one specified in the kernel. Don't know how that happened, but was able to run AVWizard_Run.sh by starting the MD's orbiter and then going to a console and killing X. I was able to change from UI3 to UI2 successfully, but now I have no video at all when playing video's or mythtv...just a black screen. Good Grief.