Exact Mixes is not in a PUBLIC RELEASE build - it is private only... even though its been around for months... it may be subject to further changes.
The current PUBLIC RELEASE (26/03/12) is CatalystPM 4.40_m364_HD
samsc.com/showthread.php?t=2068
Those of use with more recent PRIVATE builds should remember that these are indeed PRIVATE - not for public use or viewing or open discussion!!!
Anyone else should refer to Richard directly for any queries about 'exact mixes'
Simon