Plasma tv's viera cast through xp ics

Ive got a desktop connected to my tv for various functions aside from just looking cool some of which requires xp, so please no go install some form of linux replys its not really an options in this case. But enoguh rampling, currently the pc is connected through a wireles nic to my router and i have my 360 connected through the pc using the built in xp internet connection sharing feature. what i want to know is two fold.

first: can i use a similar method to connect my tv through the pc for its vieracast functions

second: if the above is true could i use a simple hub to connect both through the pc at the same time or does xp lack the capability to handle routing functions?

and i guess third if all the above are true anyone know the ports i need to forward for vieracast?