For instance it's a standard Windows procedure to put the PDF on say the desktop then Shift-right click on it and use the Open With to tell Windows to use Acrobat. You check off the "always" to make it stick.
Have you used this to make the ASSOCIATIONS?
Bob
Outlook will not open an Adobe PDF instead it opens Office imaging documents. Office 2003 installed on win2000.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic