Grayhem, i think you can do both. Via network or via link the computers together directly. All it needs is a unique address for each computer. Normally an ip address. Then you define ther cows via those addresses and all can participate. As well, exactly what i am doing.

And i think you asked it before - to run Windows XP on the Mac Pro you indeed need a license for XP. But Windows XP home isn't too expensive - and this would be enough for the Mac Pro.

One day your ship comes in - but you're at the airport.