Summary:  You want to push a user state to a system that is already in production versus one that is a fresh deployment.  How do I do this?

Solution:   

loadstate \\2000.I.P.Address\peinst\user_states\#\USMT /all /progress:c:\proglog.txt /v:13 /l:c:\scanlog.txt

# being the correct ID

USMT (loadstate):

http://technet.microsoft.com/en-us/library/dd560804(WS.10).aspx