Yes its possible, I wouldnt have a clue how to do it on mac, but I assume your going to need a router and some network cable/cards. Ill let someone answer for this part.
The real reason I am replying, your signature....what? You do realize macs have ram too...and that windows doesnt make ram bad. (Yes it can be more inefficient at ram usage, but we arnt talking about that).
are we talking about the max amount of ram a pc can have?
isnt it 128 gb? haha
For vista 64 bit, yes, the max is 128...theoretically. There arnt any motherboards that support that.
But this is WAY off topic, and we need to get back to the main question. Dude needs help setting up macs on his network.