I could have sworn this was possible. I have several music CD's copied to my XBox's HD and would like to play them with full-screen visualizations. Is this possible?

Yes.

Press "Y" then "X" while playing audio CDs or soundtracks stored on the HD. That will bring up the full-screen geiss-like visualization.

Another way to bring it up is using the DVD remote. Just press the info button.

-Dean-

Thanks guys. That worked.