I've googled it up many times but this seems to be the only way to get 800x480.
Isn't there a way to whack that ONE setting into display config directly?
DisplayConfigX costs more than I'm willing to pay for a one-off solution...
Although I guess the real reason is I'm unwilling to shell out more cash until I'm certain that an OSX front end is the way to go.
P.S. I am in NO way saying that displayconfigX is a waste of time - it's great, if I was a graphic designer I'd love the extra functionality that it provides, with multiple resolutions and tailored timings - especially for projector work. It's just a whole program for one resolution seems like complete overkill.