There are Vista drivers here, both 32 and 64 bit ones. You can try to install them in Vista compatible mode.
http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?lang=en&cc=us&prodNameId=15005&taskId=135&prodTypeId=18972&prodSeriesId=25480&lang=en&cc=us