If your X server is currently running you'll have to stop it and return to a virtual terminal.
First, setup your XF86Config file. It should load the GLX and DRI modules and specify the driver to use for your hardware. See the DRI User Guide for detailed information.
You may want to make a backup copy of your existing
/etc/X11/XF86Config file first.
It's very important that you set the
ModulePath option to
point to your installation directory:
Double check with this:
grep ModulePath /etc/X11/XF86Config
~/.xinitrc file controls which clients will be
launched when your X server starts.
You might put the following in yours:
xset b off xsetroot -solid "#004070" xmodmap -e "clear mod4" xrdb -merge ~/.Xdefaults xterm -geometry +0+0 & xterm -geometry +512+0 & fvwm