The fact is that driver loads whatever options are recorded there and completely ignores your xorg.conf setup.
It can be solved(I mean in order your changes to be recorded at amdpcsdb) if you change an option at xorg.conf via aticonfig command line tool. For example:
I don't know yet about the other files' functions but we will see...Code:
aticonfig --input=/etc/X11/xorg.conf --tls=1