<edit1>Why use a router when you dont need its wireless function, just use the 8 port wired switch.?</edit1>
The wire map you have come up with will work. You idea of a switch is correct.
<edit2>a switch performs the function of the wired router side, but provides more wired connections. some also have firewalls built in, but im not familiar with that, and should not interfere in your case anyways.</edit2>
What kind of modem? If cable, is it Docis 3.0? <--better performance for such layouts.
Cat 6 ethernet cords would provide optimum performance in this layout, they have a higher bandwidth then Cat 5a.
Do the switch and router have 10/100/1000 ports?
--The gigabit ethernet ports in your computers are insignificant otherwise, because the bottleneck is in the router/switch if not /1000. ya dig?
turn the wireless function off in your router if you do not wish to use it.
Edited by s1lents0ul, 05 November 2010 - 12:51 PM.