I googled a little just 4 teh fun of it ... look at the bottom of this page. The red written printer types ....
http://kbserver.netgear.com/kb_web_files/n101216.asp
I know it won't help you, but it at least confirms your theory.
Still you could check if HP themself offer printserver that support their 1020 ...
EDIT: this link from HP support forums tells it all
http://forums1.itrc.hp.com/service/f...hreadId=953785
Get another printer, setup a windows box to act as printserver, or live with it as it is. Sorry....