Another update on the non-starting Ubuntu 6.06.1 cd

Hi folks,
I managed to start Brltty in a shell and could see the error message
that X produced.
Turns out that X thinks i have a non-standard screen, which i have. That
is, my screen seems not to be supported. Is there any start parameter
somewhere that one could use in order to get a more generic setting for
screen depths etc?
Thanks
-- 
/Krister