of i did this:

http://support.microsoft.com/default...b;en-us;190899

but it detects Windows XP as Windows NT

fortunatly it dosen't affect much other than installing an NT 4 .reg instead of a XP .reg wit the same key values. (needed 2 versions becasue I cannot put a XP .reg on an NT box.
eg ver 4-> 5 ok, ver 5 -> 4 bad.)

Determining the differnece will add cosmetic value as the prompts will refer to the right version an cause less confusion for the users.