connect a cable from a computer to a lan port on your e1000 and log into it at 192.168.1.1.
turn off DHCP and change it's ip address to 192.168.0.2.
log into it again at 192.168.0.2. (computer must be addressed in the same subnet manually since you turned off DHCP)
configure wireless settings settings as you wish.
connect from the wall to a LAN port on your router (WAN port will be unused).
now you can access the network wirelessly and through the other 3 LAN ports.