The netplay guide is too outdated for new builds of dolphin. All you need to do for netplay in latest builds is setup your controllers, make sure your memory cards are synced, and play.
As for Wiimote netplay, it is possible, http://www.youtube.com/watch?v=8rSSsvNHbVc, and can be done. Just make sure each player sets of the wiimote they connect at in those builds.
I won't go into much more detail for Wiimote Netplay, as it's very, very involved.
3.5-2300 or newer should work without much setup at all for Gamecube games, though.
As for Wiimote netplay, it is possible, http://www.youtube.com/watch?v=8rSSsvNHbVc, and can be done. Just make sure each player sets of the wiimote they connect at in those builds.
I won't go into much more detail for Wiimote Netplay, as it's very, very involved.
3.5-2300 or newer should work without much setup at all for Gamecube games, though.