Two graphics cards and three monitors - how to?

[Colin Law]

I am trying to convert my son to ubuntu and is now trying it
(Oneiric).  Unfortunately he "needs" three monitors.  He has an
onboard ATI Radeon HD3300 graphics controller with a monitor on it and
an NVidia Gforce GTS250 with another monitor and a TV.  With the
onboard controller enabled in bios then only that monitor works.  If
he disables that one then he is able to use the nvidia controller with
the other monitor and the tv

I have googled for how to get all three going and while there are a
number of hits that look hopeful they are mostly rather old so I don't
know how relevant they are now.  Can anyone point me in the right
direction?  I fear a dose of xorg.conf is approaching, which is an
area in which I have very little experience.

Colin
-- 
gplus.to/clanlaw