Using network licenses to switch between Pro and Pre

Can someone please help.

How can I set up a computer to switch between Professional and Premium licenses (with out going through the 'Add/Remove' programs).

I have purchased network licenses of both Professional and Premium.

How can you load one license type as a opposed to the other.What I would like if possible is two desktop icons, one for Professional the other for Premium.

Thanks in advanced.

Matthew

SolidworksAdministration