Mike,
It sounds like you installed ACR in the wrong location.
Read the FAQs at the ACR forum and search for similar threads on the Bridge forum.
The most common mistake is to install ACR in a path beginning with your User library. That is WRONG. That’s why Bridge can’t see the ACR plug-in.
Start the path to the correct folder with the ROOT LEVEL driver:
NameOfYourHardDisk/Library/Application Support/Adobe/Plug-ins/CS2/File Formats/
Remove the old ACR that came with Photoshop, move the new one to the correct location, and only then launch Photoshop and Bridge.
Once you’ve done that, Purge the Cache from Bridge’s Tools menu . Cache.
If you have further issues, please post in the appropriate forum for faster replies.
Adobe Bridge Macintosh forum [CLICK HERE] <
http://www.adobeforums.com/cgi-bin/webx?14@@.3bba3d51>
Adobe Camera Raw Forum [CLICK HERE] <
http://www.adobeforums.com/cgi-bin/webx?13@@.3bb6a869>