Use the HP Laserjet 1022 driver instead of the 1020 drivers, download the HP driver from the Apple web link below:
http://support.apple.com/kb/dl907
after you have downloaded the drivers install them, then connect and turn the printer on, open the printer preference page then press the '+' button to add the printer, make sure your printer is visible, then open the driver list.
Select HP Laserjet 1022 (the standard model) and you should be good to go.