Would it possible to turn off the router functionality and use this as a wireless access point only? I don't need another DHCP server since I have my main Cisco router to do this, I just need DHCP pass though.
To achieve what you want, you simply set the AEBS to bridge mode, and let the Cisco router (or whatever comes before it from the 'net) do NAT and run DHCP.
Warranty is the typical Apple warranty, ie. a dire one year.