I'm not at my computer at the moment so I don't know if this will work, I'll try it when I get home. You can try searching for a folder called sound sets inyour OS X library or system folder and dragging a sound set from 9 into it. I have been meaning to try this but I have been to busy with projects for college. If it works let us know.
PS: in 9 you have to turn on the soundset in the appearance control panel and I have not seen any option for soundsets in X, but we might be able to enable them with the defaults write command in the terminal.
Good luck,