New
#11
That router has limited specs and is outdated by todays standards.
I highly recommend you go with a router that has Gigabyte LAN and WAN with wireless N, they don't cost much more and won't be limiting your file transfers and connection speeds like the 54Mbps wireless G router will. If you go that route also get switches that are gigabyte capible.
As for the switch locations and wires. For the longest runs try going with just one eithernet wire with a switch at the end of the run then divide up the shorter runs from the switch to the other rooms. I would really need a floor plan of the house to give you the best possible lay out.