Yes now everything is working according to plan
So I did as the link I previously posted..
Downloaded new driver from Asix.
modprobe -r asix
untar the archive
sudo make install
plug in the device. and then I just rebooted to be sure it's all ok.
Now I have my setup like this:
Laptop internal Ethernet plug connected to my ADSL.
Laptop USB-0401 Level One connected to my WGR614v6 router in LAN port and disabled DHCP in AP, and set LAN to a static IP (As you guys have described)
And now my client laptop can connect via wifi, and also my phone (Nokia N9) is connected via wifi and they both get DHCP IP from my LinuxMCE.
I wanted my Level One to be serving my internal network, due to it's a gigabit ethernet, so it wont be the bottleneck ( I will keep an eye if it instead will use all USB bandwith in the future, and then swap those NIC interfaces).
Thank you all for your positive and helpful comments :-)