Open Control Panel, select Printers
Click Add a Printer
Click Add a local printer
Select Use an existing port (should be preselected), change the port to "Desktop \*.pdf (Adobe PDF Port), click Next
On the next page, click Have Disk...
Click Browse and browse to C:\Program Files\Adobe\Acrobat 8.0\Acrobat\Xtras\AdobePDF (or wherever you have Acrobat installed), click OK.
It should now show a series of "Adobe PDF Converter" entries. Select the first one and click Next
Change the printer name if desired, uncheck the box to use it as a default printer, click Next
Do not print a test page, click Finish
Find your new printer in Printers. Right click on it and select Properties, Advanced
Click "Print directly to the printer", click OK