I broke it.
C:\Documents and Settings\Administrator\Desktop\Geoffs Scripts>cscript usermod.vbs
Microsoft (R) Windows Script Host Version 5.6
Copyright (C) Microsoft Corporation 1996-2001. All rights reserved.
Change sn from 'birch' to 'Birch'
Change givenName from 'jodie' to 'Jodie'
Change displayName from 'JBirch07' to 'Jodie Birch'
Change name from 'JBirch07' to 'Jodie Birch'
Change cn from 'JBirch07' to 'Jodie Birch'
C:\Documents and Settings\Administrator\Desktop\Geoffs Scripts\usermod.vbs(124,8) (null): The server is unwilling to process the request.