The instructions don't seem like much because getting basic networking going is pretty easy. As long as your PCs have their default setups, it is pretty much just hook the cables up, power the router and go. You should only need the LAN wizard if your machines can't see each other in the Network Neighborhood or My Network Places.
Unlike your PC Stop guy, I find WiFi very reliable once it is working. The trick is getting it working with some level of security.Even that isn't that hard. Some key points:
1.Make sure the Router/AP and the wireless tablet have EXACTLY the same SSID and WEP keys configured. For the WEP keys, the keys should be in the same order. You do not really need all four keys, one will do.
2. Turn off IEEE 802.11x (aka WPA) authentication unless your router supports it.
3 Make sure that neither the LAN connection nor the wireless connection are bridged.
Your tablet has Ethernet as well as wireless. You should be able to switch between the two at will. Leave the LAN connection setup at the defaults (i.e., automatically get IP address).