Its clear to me you're not sure which bedrooms have a connection. Can you verify that first.
Go to the house make an inventory of where the sockets are present and where they are not.
You want to get it done with an AP instead of a repeater as you won't lose half the speed. Since you say you have wired the house up for ethernet already. Why use a repeater in that case ?
You need a socket to plug the n56 to and another to plug the AP to.
The guy said he internally wired with a 4 ply wire, which 2 will be for phone and other 2 for the LAN, I need to get the plugs installed on the wires, in the mean while I went out and bought the TP Link WR941ND, have been trying to use it in WDS mode, but something is not right, I managed to get it to get internet connection but its really slow, and page doesnt load fully. I also tried the vice versa, but the N56U would get lost(unable to login to the router settings page) after I disabled its DHCP.
Here are the steups:
1) Put them on the same channel
2) Removed security
3) Both router set to 20/40MHz
Modem ip - 192.168.1.1
N56U - Main router connected to ADSL modem - IP/SSID/DHCP - 192.168.2.1/Jasku/192.168.2.2- 254
TL941ND - WDS - IP/SSID/DHCP - 198.168.2.2/Jasku1/disabled - Added the N56U SSID and MAC. ( Also worked with a different subnet i.e.TL941ND with 192.168.0.1)
Am able to ping the N56U while connected to the TL, but after sometime, the connection drops, have bad latency, after a while I get 'no internet access' on the TP941ND, and then when I connect it works for sometime.
The vice verse configuring the N56U was difficult, as soon as I put the router in the same subnet as the main router (TPLInk) and disable the DHCP in the Asus, I could not login to the Asus router page, within the Asus I chose the 'Hybrid' mode to connect to the TPLink AP, if I choose 'WDS' only, the SSID of the Asus merges with the TPLink.
I am not sure whats wrong here, can the experts please help out?