Have the same system on two of my PC's and don't know what they are thinking telling you too 'BUY' a cd for it.
Go here:
http://uk.europe.creative.com/support/downloads/
Select your product, 'There are a number of Audigny 2 models so you can choose the right one from the list.
Click the 'GO' button which takes you too the next selection page.
Make your choice of Language/Operating system/required package.
Click 'Go' once more and then select your needs from the listing presented.
First the Drivers package, does for the 2 and the 4 series.
Then any applications you feel you might like or need.
It downloads to your desktop.
Close the browser and click the icon and it will install for you.
Reboot and your on your way again.