A model specific install CD (with grey label) will only work with the Mac model it was provided with.
A general 9.0.4 retail system install CD has a white label with large yellow "9" on it.
On the Macintosh Garden site you can find a disk image of a SheepShaver compatible 9.0.4 retail system install CD.
Or you could try to use your PowerBook install CD with this hack: http://www.emaculation.com/forum/viewto ... ight=crack
The resulting installation may not be fully functional, though, specifically with regard to sound.