there is no windows 7 driver, however there are two options.
intall the vista version (they have the same basic file system) not sure if it will install
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-59558-1&cc=us&dlc=en&lc=en&os=2093&product=1842189&sw_lang=
install update assistant from hp