Configure gateway on an interface brought up with dhcp

My home network is quite non-standard. I have an AirLink 101 wireless router which act as a DHCP server as well. I haven't found a way to configure this device so that the data returned by the DHCP server to the clients will include my real gateway machine's address. I think this is possible with this device but since the manual is so sparce and I haven't encountered information online that shows me how to do this so I change the gateway address instead on the clients. For machines with Debian Etch installed, this can be configured in /etc/network/interfaces. See below for my configuration:

#: nano -w /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp
 gateway 192.168.1.10
 up route del default
 up route add default gw 192.168.1.10

~ts