Here all what i done:
Lan adapter for wii
PC with 2 network card
thing to do:
-connect the Wii Lan adapter on the wii.
-Connect a network cable from the Wii lan adapter to your second network card on your pc.
-Make sure your pc is connected to your router with the other network card.
-Make sure your router have the option enabled to passthrough PPTP and L2TP(both just in case).
-Open your Wii, create a wired connection(it will surely prompt a message saying an error but just make sure the connection wired is there even if the test connection failed).
-Turn off your wii
-Maybe i can recommend you Overplay to choose for your VPN service.
-Get a account ready to be use.
-Download the software Overplay VPN(here the links to download the software) https://patch.oppatch.com/Windows/v2/
-When it will installing, it will create a Local Area Connection(it created "Local Area connection 2" for me).
-Go in windows to the network connections.
-make sure the vpn is off(close the software Overplay).
-click on the Local Area Connection it created, go in the tab Sharing. Check the option "Allow other network users to connect through this computer's internet connection" and choose your network card where the wii is plug into make the share.
if there something you didn't well understand, it will be a pleasure to help you.Sorry by the way for my very bad english.