Just wanted to give a little help to the people with printers no longer supported on snow leopard that used to work under leopard. I was able to get my parents 'unsupported' HP printer working in snow leopard by doing the following: Insert a Leopard DVD Run the printer drivers optional install of of the Leopard disk. Open the Print & Fax settings under System Preferences Right click in the white 'Printers' box on the left of the screen and select 'Reset printing system' After doing this (and rebooting somewhere during the processes), the printer seems to be working fine. My reasoning for attempting this is I hadn't seen any major details on driver level changes to the Kernel and figured the old printer drivers probably just were not moved to 64 bit. Since my parent's iMac only runs in 32 bit mode anyways, I figured I'd give it a shot. Now, before anyone goes and tries this out, please run a time machine backup. No guarentees it won't blow up your nice shiny computer and set your pants on fire. But it did work here, and now my parent's aren't out a few hundred for a new printer... Hopefully this helps someone!