Hello Mac pros. I am new here but have been reading the info here with great interest. Well I gained enough confidence to try an upgrade from OS 9.0.4 to 9.1 with the Apple CD. Have a Pismo G3w/OS 9.0.4 and tried CD install of OS 9.1, following all directions. DANG! Was within 5 minutes of finish and it hung. Dialog box said the Install engine failed to open & CD drive running very fast/loud. Hung right there would not do anything. Had to hold boot button down to force stop. Then, Tried to boot up again with OS 9.1 CD. The app assistant installer would not work & dialog box said restart, so I restarted and Mas OS 9.1 starting screen came up CD drive running very slow. Now hangs as startup only runs 1/6th of the bar across, and a dialog box opens with no print, now CD disk is silent, not moving. Will not boot from CD or HD! Now what?!?!