Mirroring Dedicated Traffic

We are using the following configuration:



2 stand alone Windows 2003 servers 64 bit.

Each have two Gig Network cards configured with different IP addresses.

Each running multiple instances of SQL Server 64.

I am trying to set up a mirror where mirroring traffic between servers will be dedicated to a secondary IP address on the second NIC.

I am also trying to avoid Windows authentication.

Interesting enough: Security Configuration screen suggesting you to use fully qualified TCP addresses and, at the same time, does not give you such an option...

Would someone please point me in the right direction?

Thank you.