I tried to take a look using the nLite win installation tweaker, but not foudn a thing.
Maybe, like using the ServicePack on win install dir:
update.exe -s:C:\Win2kInstallOrg
...there is something...?
I know, there is no "update file", but maybe there is a option to run the setup...? Or something?
If it is not possible, then tell me too, so I could stop looking...