[plug] How do you change the "indentity" of your OS?

[Senectus .]

I want to go see the rather amusing "BIG AD" that is on the web at the
moment (http://www.bigad.com.au/).. but when I go there I get :
Unfortunately, the Operating System you are currently using is unsupported. 

(yes nasty complaint e-mail coming)
How do I get FireFox to tell the web it's "some other OS" ?


uh.. I just realized I'm going to complain because I'm being barred
from seeing an advert... strange world.

-- 
Ubuntu Hoary 5.04 
"Luminocity is a cracktastic technology testbed for Metacity." - From
the gnome.org website
www.modmeup.net