Yes, thats all. After installing the protocol, check its properties, make sure you and people you playing with IDs are not the same, its goes something like this : 0000000, change a few random nubmers, but keep the digit amount.
Dune LAN uses IPX protocol, isnt installed by default. Go to your network adapter > properties > install > protocol > ipx/something > ok. You can create your own virtual LAN and play with anyone around the globe using program called Hamachi, google it. Edit: Down with atreides!