[CentOS] Centos 6.3 - unsupported video hardware

I pulled one of my old OQO model 2 out of the junk bin and installed 
Centos 6.3 over Centos 5.3.

The internal video does not work in graphics mode (text works fine), 
though a monitor attacked to the VGA port works fine.  Although my 
intension is to use this as a portable test server, it would be nice if 
the video was available.  How might I go about figuring out the Xorg 
magic to get it working?