Nope, don't use those. Use the 9.8 drivers on AMD's blog, apparently up to 50% increase in certain games with your X2.
http://blogs.amd.com/play/2009/08/14/what%E2%80%99s-a-good-title-for-a-quakecon-blog/
Supposedly they'll be available from the site mactronix posted tomorrow, but you can get them early.