I have a Mac halo game (purchased) but it seems I need a different Key
code for playing multi-player over my home network. I have two
questions: 1) is this the case (or am I doing something wrong), and 2)
If I do indeed need a different Key code for playing multi-player over
my home network, can anyone direct me to where I can obtain one
(preferably for free).  Most multiplayer games I've encountered do not
require a different Key code for playing multi-player over my home
network.  I was quite shocked to see a message which suggested that this
was the case.

Cheers,

Spaceman Dave