We recently published a new KB article you might be interested in. This one covers the issue recently mentioned on the blog at http://blogs.technet.com/softgrid/archive/2007/09/19/error-53256-sequencing-adobe-cs3.aspx and in the SoftGrid forums at http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=2161712&SiteID=17.
Error message when you try to sequence a program in Microsoft SoftGrid: "SystemGuard download failed (error code 53256)"
SoftGrid for Windows Desktop
J.C. Hornbeck | Manageability Knowledge Engineer