by using two machines with monitor's setting by each other and one keyboard ducktaped to the other and two mice (One Spray painted red).
I remember the first time I thought about multiboxing and found the wireless keyboard sharing setup, but I never though someone would go so far as to tape the keyboard together. Sound like you are in for a treat when you try out keyclone. You might want to try some of the multibox addons while you're at it.