No screen found / Video problem -----------> how to solve

Some of you may have problem with X that fails.
You first must know that i am the only guy working atm on the livecd rpject, so i do what i can ! :-p

To solve the video problme/screen not found :
From the black screen :
cd /etc/X11
run "mc"
enlight xorg.conf
type 'F4" to edit file
search the "section device" and the 10th line (about)
change the driver name to vesa
type F2 to save
type escap key to quit and F10 to close MC
NOw type "startx" and it should work