Microsoft Keyboard Layout Creator version 1.4 has now been released.  See http://www.microsoft.com/downloads/details.aspx?FamilyId=8BE579AA-780D-4253-9E0A-E17E51DB2223&displaylang=en for the download.

Thanks Michael for making this happen :)  Michael blogs about his work here: http://blogs.msdn.com/michkap/archive/2007/01/30/1557184.aspx