Virtual Screen Resolution

[Laurent]

Hi there! For a friend of mine, I need to know how I can set my screen 
resolution so that my desktop is larger than my screen. I know I have to 
edit /etc/xorg.conf file but what must I put in there? It should have the 
effect of a screen magnifier where the whole desktop is enlarged (a simple 
magnifier would just enlarge a part of the screen). I've searched for that 
topic in kubuntu forums, but only found mails which talk about the other way 
round (= of how to get rid of virtual resolution).

Thanks for your advice!
Laurent
-- 
And on the seventh day, He exited from append mode.