AHA! That makes sense now dude! Sorry :$
I *think* you are going to need a Wifi Router.
Ive not heard of this situation where a Wifi and NIC share a connection, I know and have done it with a NIC.
Hmm I think Wifi Router is going to be the easyiest, this one aint half bad for the price
http://accessories.virginmedia.com/w...ode=SELF520302
Works well and is a piece of cake to setup and secure!