Got a scanner, printer, all-in-one device that is not supported on your OS, maybe a new printer and you do not want to upgrade your OS. All is not lost!

For scanners try VueScan found at: http://www.hamrick.com/ It replaces the software bundled with your device and is supported on most OS.

For printers try Gutenprint found at: http://gimp-print.sourceforge.net/index.php Its an open-source project so might take some time for new printers to be supported, yet you might be lucky for your situation.