How to config XF98_MGA

[cj]

Hi!
  
   My computer's card is Matrox AGP G100,Now I downloaded a server 
XF98_MGA.It's only one file 
after uncompress and i put it to /usr/bin/X11,change the config in 
/etc/XF86Config and Xserver.
But it doesn't work.After startx,it report can't find the server.I have add 
some line of G100
in /usr/X11R6/lib/X11/Cards,but in XF86Setup,there's only the card ,no the new 
server.How can i
do?
  Thank you.
                                                               cj