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ATI Catalyst™ Beta Driver Package for Windows 7 ATI Catalystâ„¢ Beta Driver Package for Windows 7
There are two download links found on the page there for both 32bit and 64bit flavors of 7. Hope that will help you rule those out since those seem to be the only beta packages date 1/7/2009 when running a search there other then the 9.6 beta release.