|I suspect the issue is ICS. If memory serves me, ICS uses 192.168.0.0/24 for it's network and the ICS host gets the .1 address|
Why don't you just buy a switch and connect it to the router, then connect all clients to the router.
If it's a case of the original router not being wireless capable and you have a need for a wireless network, you could either:
A) buy a wireless access point and connect it to your router
B) you could buy a wireless capable router and connect it to your existing router.
If you should opt for B, click on my name above and read my "how-to" guide titled, "Add a second Router to your LAN" for information on how to correctly daisychain the second router. You'll want the "LAN port to LAN port" connection scenario.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.