I have found an important link at HP for 3in1 Officejets:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00501015&cc=us&lc=en&dlc=en&product=79477&dlc=en&lang=en#
It has stopped my almost daily crashes on my G5 1.8gh Mac and is well worth the effort.