Setup WRT54G (or similar) running DD-WRT as Access Point

Blog from: http://www.maximumpc.com/forums/viewtopic.php?t=59541

Setup > Basic Setup > WAN Connection Type: Connection type: Automatic Configuration - DHCP

Enter a good (outside of your DHCP range) IP address (and, of course, match your current subnet);

Setup > Basic Setup > Network Address Server Settings (DHCP): DHCP Server: Disable
Setup > Advanced Routing > Operating Mode: Operating Mode: Router

Setup > Advanced Routing > Dynamic Routing: Interface: Both

Setup > Advanced Routing > Static Routing: Interface: LAN & WLAN