[ydl-gen] PS3 recovery boot

[rhubbell]

I've installed fine and change /etc/yaboot.conf to use video=ps3fb:mode:2
but now it boots and I get a blank screen.  ctrl-alt-f1 doesn't work.
How do I boot to the 6.2 install dvd so I can edit /etc/yaboo.conf?

I've searched all over the place and no luck finding the solution.
I'm guessing I just need the right command to boot the cd into 480i
so I can get at the install on the hdd.