This is really bad bloatware that doesn't have an uninstaller, and loads your System to daemons that eat up resources in background, and extraneous software that's not made for Tiger or Leopard, not to mention Snow Leopard. If you need to print, use the HPIJS drivers available here:
<http://www.linuxfoundation.org/en/OpenPrinting/MacOSX/hpijs#Usage>

I posted instructions for installation in a reply here:

<http://www.versiontracker.com/php/feedback/article.php?story=20081109165013205>

If you need to scan, you might consider ViewScan (too expensive in my opinion, but works) or perhaps SANE for OS X (free, but I've never used it with this scanner).