Works! I tried Rosetta, QEMU and WINE OSX to get a simple program that ran in 98SE, 2000 ans XP to run, but no dice. Someone blogged that Sun's was an "also ran" but I didn't want to pay for Parallels, so I gave VBox a try.
I have Snow Leo on an Intel Core Duo and XP actually installs and runs just fine. Go Sun!