I recently came across a new free tool on the web and thought you folks might be interested in knowing about it. It's called OSD Editor and it's a GUI based tool that allows you to open an existing OSD file and edit it. All the possible categories are read from the OSD file and displayed in the appropriate tab. You can insert and/or delete values from the OSD so you don't have to worry about opening and closing tags or anything like that any more. There are some fields you can not edit but this is by design as these are fields that should never be edited such as the GUID of the sequence, etc. Additionally, the OSD Editor also educates you on the meaning of some of the XML tags that can be used in SoftGrid OSD files.
This is not a Microsoft tool and as such we make no warranties or guarantee's, nor does Microsoft support the use of this tool in any way. This is one of those 'use at your own risk' type of things but I think you might find it useful.
For information on OSD Editor see http://thincomputing.net/newsitem3237.html.
J.C. Hornbeck - Microsoft SoftGrid support