How to play CS (and other games) through ICS

[Confused]

i have set up my old 233 with Windows 2000 Pro and set up ICS, as i will be adding to my LAN here soon, and would like to know how to set up CS and other games so that i can play them through the ICS machine. i do not really want to have to unplug the cable modem from the ICS machine and plug it into mine whenever i want to play any games online.

I am willing to set up any 3rd party software that may be needed as well

Thanks in advance

ConfusedBW