Will SureWest/CCI work as wired network?

[Cozarkian]

Background
I have a SureWest box on the outside of my house. There are three cat5e cables running from it into three rooms of my house. Originally, one connected to a router and the other two connected to DVRs. I've now cancelled their TV service. Also, SureWest supplies a router with no discount for declining it, so I happen to have an extra (old) router lying around.

Question:
Can I make a wired Ethernet network by configuring the router as an AP and connecting it to the Ethernet wall jack, through a LAN port?

 

[Cozarkian]

Okay, update and further request for help. I now have the following setup

Router #1
192.168.1.1
DHCP Range 192.168.1.10 to 192.168.1.254
Wireless On
Connected to in-wall RJ45 via WAN
Connected to second in-wall RJ45 via LAN

Router #2
192.168.1.2
DHCP Disabled
Wireless Disabled
Connected to in-wall RJ45 via LAN

Computer
Connected to Router #2 LAN Port.

Result
I can access both router admin pages from the computer, so the routers are connected. However, I can't get internet (including via wireless on other devices).

The problem seems to be the second connection from Router #1 to the wall via LAN. If I unplug this cable, I get internet back, but I can no longer access Router #1 through the computer connected to Router #2.

Anyone have any idea how to fix this so I can get internet via wired connection on the computer?