X re-configuration

[Willie McKemie]

I have screwed up my X configuration.  Searching about, I find that
dpkg-reconfigure -plow xserver-xfree86
should fix me up.  However, it doesn't.  It seems to create a new 
/etc/XF86Config rather than /etc/XF86Config-4.  At any rate, "startx" 
doesn't bring X up.

The install X configuration worked OK, can someone tell me how to do 
that again without having to re-install?