Great question! Yes, you can. But there are two things you need to do:

- First, turn off the DHCP server in the old wireless router. Your new router will also have a DHCP server, which will probably be enabled by default and you don't want the two to conflict.

-Then change the address of the old wireless router so that it's in the same subnet as the new router and doesn't conflict with the new router's base IP address or DHCP server range. This will ensure that you can reach the admin server of the old router from any LAN machine.

Example:
- New router base address is 192.168.1.1 with DHCP server range of 192.168.1.100 to 192.168.1.150
- Set old router (the one you're using as an Access Point) base address to any IP address between 192.168.1.151 to 192.168.1.254

Once you take care of the items above just connect the uplink port on one box and a normal port on the other. It doesn't matter which you use on which box, but don't use the Uplink ports on both boxes!. If neither product has an uplink port, just use a crossover cable to connect any LAN port on one box to any LAN port on the other.

Note that since you're no longer using the routing part of the wireless router, none of the WAN (or Internet) setup parameters matter. You can just leave them as they are... they won't affect anything.