xorg.conf block my machine

[Pablo Allietti]

hi all. i have xorg loading in tty7 at startup. 
i change my mouse and i modified the file xorg.conf to mouse0 to mouse1. 

well.... the problem is my machine cant start again :( load all system
but when finish and try to start X system the screen blinking and i cant
do anything

i try to load freebsd in safe mode but nothing the same is possible
modified the file xorg.conf in any way?

i boot in single user too. but the filesystem is read only and i cant
find a editor too. :(
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Pablo Allietti
LACNIC