If you are talking about a Windows XP Media Center Edition 2005 system, you should know that none of the ATI All-In-Wonder cards are officially supported in WMCE 2005.
However, the AIW cards that are based on the R300 or later chipsets will work in WMCE 2005 provided you use the latest Catalysts drivers. This info comes directly from ATI, but, because it is not official, ATI will not support it. In other words, you will get no help from ATI.
With respect to the AIW 9600, it is a marginally competent part, and you may find that it will not work very well in WMCE 2005 or not at all. You'd fair better with the AIW 9800 or later.