Unfortunately, the only Envy printers with included support on 10.6.8 are:
HP ENVY 100 D410 series * | 3.3.2 | P | S |
HP ENVY 110 series * | 3.3.2 | P | S |
HP ENVY 120 series * | 3.3.2 | P | S |
HP ENVY 4500 e-All-in-One * | 3.3.2 | P | S |
HP ENVY 5530 e-All-in-One * | 3.3.2 | P | S |
HP ENVY 5640 series * | 3.3.2 | P | S |
HP ENVY 5660 series * | 3.3.2 | P | S |
See this support document for other supported printers:
Printer and scanner software available for download for your Mac - Apple Support
You might find some printer drivers on open source for 10.6.8, or some on HP's own website. See my FAQ*:
http://www.macmaps.com/printersx.html
Otherwise I'd try to return or sell the printer and get one that is known to be supported.
* Links to my pages may give me compensation.