Sometimes if there is no Windows 7 driver available, the Vista driver will do the trick. However, I browsed the HP website for you and it appears that there are no Vista drivers for your printer. To see a list of operating systems that your printer is compatible with visit the HP site - http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?product=58394&lc=en&cc=us&dlc=en&submit.y=4&submit.x=5&lang=en&cc=us#
Sorry I don't have better news for you.
Microsoft Windows Outreach