HPS just released the Direct Download version of Vicksburg which you can find here: http://www.hpssims.com/shopping/shopdisplayproducts.asp?id=4&subcat=5&cat=Early+American+Battles
(http://www.hpssims.com/shopping/shopdisplayproducts.asp?id=4&subcat=5&cat=Early+American+Battles)