adsl --------+  (plugged into wan, wrt gets dhcp from adsl)
x.x.x.x      |
             |
             |
switch --- wrt54g  ))))))))))) belkin  )))))))))) wireless pc
  |        lan:  192.168.1.1   192.168.2.2        192.168.2.x
  |        wifi: 192.168.2.1   gw: 192.168.2.1    gw: 192.168.2.1
  |        gw: x.x.x.x
Pc1, Pc2         |
192.168.1.x      |
gw: 192.168.1.1  Pc3
                 192.168.1.x

wrt54g is in wireless client mode connected to the belkin runing as an ap