I've set up this type of network a couple of times with linksys routers. It was pretty straightforward.
DNK said:
1. Need different IP addresses.
That refers to the 2nd router. You may need to reconfigure it before putting it on the network, or at least ensure it's preconfigured IP is different than the other router. Linksys routers usually all use 192.168.1.1 for example - so if you had two linksys routers you'd need the second to be anything but 192.168.1.1 (192.168.1.2, for example).
You also need to reconfigure DHCP on the new/second router. You might be able to reconfigure the range of the DHCP ports on the two routers so they don't overlap, but I've always just turned DHCP off on the second router and I think that's what's normally recommended. If you manually assign IP addresses to your devices then DHCP shouldn't be an issue anyway.
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]2. Need a different name[/QUOTE]
Yup - the SSID for the wireless network needs to be different (I think there are some exceptions to that, wireless-extenders can be configured on the same SSID but I don't think routers can be reliably configured that way).
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]3.Need to be hooked together.[/QUOTE]
Normally all you do is use one of the ports off of one router and wire it to the internet port of the other router as if it was another computer. All it requires is an open port on your existing network. I've never configured two wireless routers to work together wirelessly (maybe it can be done, I don't know).