The command for setting WINS is below:
Netsh interface ip set wins name="Local Area Connection" source=static addr=192.168.100.3
There is a netsh wins command as well, but that is for Winsock. Lost some time on that one before...
Also, if you are setting WINS on the wireless connection, the name will be different of course. Just run ipconfig to see what the name should be. It needs to be exact as far as I know.