Thanks to UnderScore and Robert for their replies. The machine in question is my work computer, so I needed to wait until Monday morning to try it. I did look over the cheatcodes several times, and, unfortunately, I missed the "nosmp" option each time. Sorry I missed it, and thanks, again, for your sharp eyes.

So, this morning I booted the computer up with the 4.0.2 Live CD using knoppix nosmp boot options. I only got one penguin at the top of the screen, so I guess it was trying to boot the uniprocessor kernel. Unfortunately, it froze right after that (not even any text!), so I guess it is back to WinXP until I have time to experiment with more cheatcodes. (As a reminder, the SMP kernel did boot on this HT-P4, but there was no sound. I suspect that the SMP kernel doesn't have sound compiled in it).

--FW