Hi, there is an even better way in which you can set and change the IP subnet and gateway during runtime. This way, you can have functions that can change these settings in a "live" environment, very useful to me because alot of my installations are about 2 - 3 km underground in the gold mines (south africa). If you would like a code sample then shout.
Now I also have a question that I guess may be useful to many people. I am not a networking person, so I don't know all the terms, but I want to use my Rabbit on DHCP, and give it a name (as your PC would have a name on the network). Then I would want to access my Rabbit over the network using its name rather than IP address. Does anyone know if that's possible?