Adobe PDF printer Resolution

Hi:

I am going to be deploying Adobe Acrobat 9 to my organization.  Due to our print requirements, I need to set the PDF Printer Resolution to 600 DPI, it's default value is 1200 dpi.

I need to know which registry key needs to be changed.

I can only find one under AVGeneral called iprintDPI but changing this does nothing to the PDF printer resolution.  I have changed the resolution in the driver manually to 600 dpi and this key is not updated.

If this can not be done in the registry, is there another way around it?

Thank you,