With my (albeit limited) experience, you'd be better off purchasing a switch and hooking that into your router. That way you don't have to worry about conflicting DHCP servers. But, if you're not looking to purchase hardware, then you can daisy-chain the routers, but you have to decide which router will be the master router (i.e. has DHCP enabled), and then dumb-down every other router's settings so that they don't lease IPs. You probably have to put every computer attached to the slave routers into the DMZ as well, just so you don't have a port-forwarding nightmare. I could be wrong, though--I've never tried to daisy-chain routers myself, so I may be making it more complicated than it really is.