Office Authentication Prompt in Vista for Sharepoint Documents

I recently ran across a problem with the Vista clients on my network being prompted for user credentials each time they opened a document from a document library -- even though they were already authenticated to the portal. With some help from my network administrator, we were able to find a solution that seems to work well. The information for this fix was posted here. We implemented solution 2 into our network and everything has been humming along perfectly. Hope this helps someone stuck with this problem!