USMT backup multiple profiles

Hi,

I am currently in the process of encrypting 285 laptops ( a horrible job it has to be said )

Before encrypting said laptops I want to backup user profile and settings ect…incase of sys crash blue screen.

When I run USMT from the run command I get file and settings transfer wizard, But this only allows me too backup current logged in profile (administor) whereas I need to backup user profile settings and all locally stored doc’s ect.
I’m sure this is possible with usmt just dont know how and cant seem to find clear explanation on knowledge base.
All systems are running XP service pack 3

Thanks in advance

Jonathan