Setting a default modeline in xorg.conf

[Luke23ae]

Hi,

I'm trying to setup my (ubuntu-mobile) "xbmc live" to use with my oldschool analogue-standard-definition-TV. I bought an adapter, but I need to use the right resolution and refreshrate for videooutput. Therefore I searched the internet and found the right modeline. However, as I've been told, I need to set that modeline to be the default modeline so xbmc will actually use it. Can anyone tell me how to do that? Google doesn't quite help here unfortunately :S

Thanks
Luke

[Luke23ae]

I mean I think it doesn't have to be the default modeline, I just need to tell him to -use- that modeline