iPrint Appliance Printer migration tool (miggui)

Hi.
I am testing the iPrint Appliance .
I am in the process of testing the printer migration tool (miggui) .
My question is when the migration is run does it delete the existing (source) printer objects
or will it create new printer on the appliance and the two systems will run side by side ?

I do not want to lose the current printing environment.

Any advise will be appreciated

Thanks

DR