Custom X scripts no longer work

Hello.

I have been wresting with this for a while, and I cannot find any clear 
documentation on the best way to do this.

The problem is that I have several thin client machines that have video cards 
that are not well configured by the default XF86Config-4.tpl.  I used to 
use /tftpboot/pxes/config.  I put in a nice little script that deleted and 
over-wrote the /etc/X11/XF86config-4 file.  It won't let me do that anymore.

The reason I overwrote the /etc/X11 file instead of the /tmp/parsed file was 
because the customization scripts are called too early in the rcS, and my 
copy would be over-written when X configuration took place in the rcS script.

So, I tried hacking the rcS script, and put the copy of my custom XF86config-4 
file at the end so it would not get overwritten -- still no dice.

The problem seems to be that it will not let me overwrite any of these files.  
It used to on pxes-0.5, but not anymore.

This was the working version of my script:

/usr/bin/tftp pxesserver >/dev/null <<!
        timeout 30
        get Xs/XF86Config-4.virge
!
mount -n -o remount,rw / 2>/tmp/bs.log    ## was necessary because mounted r/o
rm -f /etc/X11/XF* 2>/tmp/bs.log
cp -f XF86Config-4.virge /etc/X11/XF86Config 2>/tmp/bs.log
cp -f XF86Config-4.virge /etc/X11/XF86Config-4 2>/tmp/bs.log
mount -n -o remount,ro 2>/tmp/bs.log

bs.log is always made, but always empty.

I likewise cannot write over /etc/X11/XF86Config-4.tpl -- Operation not 
permitted.

Is there a better way to do this, or a way I can do what I have done in the 
past?


Thank you!

Chris


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