user specific xorg.conf?

[Gary Aitken]

In attempting to zero in on my system crash problem, 
I need to customize xorg.conf.
As I read the documentation, 
there is no way for an ordinary user to provide an xorg.conf;
Xorg looks for files in the normal server search path,
which does not include any user directories --
unless the user is root.
Am I missing something?
Is this because of the security vulnerabilities in X?

gary