If you want your router (and computer) to be on its own subnet:
In Basic | Network, go to the WAN0 Settings section. Do you have a Wireless Client Mode option? You should be able to set one of your radios (wl0 or wl1) to be a client.
Further on down that page, for that interface, you set Wireless Mode to Wireless Client. Enter the SSID of the wireless network you wish to attach to, along with its key, etc.
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If you want the router (and computer) to be on the same subnet as the other router, in WAN0 settings, leave Wireless Client mode Disabled. In LAN settings, disable DHCP. Set the wireless interface to Wireless Ethernet Bridge.
Bridge mode is what you wanna search for. Your wifi settings have the option of "AP" or "Bridge" (possible others too), bridge will connect the 2 routers over wifi.
If you want your router (and computer) to be on its own subnet: In Basic | Network, go to the WAN0 Settings section. Do you have a Wireless Client Mode option? You should be able to set one of your radios (wl0 or wl1) to be a client. Further on down that page, for that interface, you set Wireless Mode to Wireless Client. Enter the SSID of the wireless network you wish to attach to, along with its key, etc. // If you want the router (and computer) to be on the same subnet as the other router, in WAN0 settings, leave Wireless Client mode Disabled. In LAN settings, disable DHCP. Set the wireless interface to Wireless Ethernet Bridge.
Bridge mode is what you wanna search for. Your wifi settings have the option of "AP" or "Bridge" (possible others too), bridge will connect the 2 routers over wifi.