ATI TV out Linux Mandriva

[Joey Prestia]

     I have a Alienware Area 51 with an ATI  Radeon   X1800 video card 
and am running Linux
Mandriva 2007 and am trying to figure out how to configure X to utilize 
the S video out right now I have a HD TV and am only seeing the screen 
that is on my laptop in the very middle of the TV the screen. The height 
of  the picture is taller than the screen and the width is all scrunched 
up ?  How do I configure ?
                                                  Thanks Joey Linux Newbie