Install with external CD drive

[Denis Piette <dapiette@vub.ac.be>]

Hi all,
I'm trying to install Etch on a G4 Powerbook that has a defect internal CDrom
drive. I wanted to use an external CD drive connected via Firewire for booting
an Etch Net install disc. I started the booting proces by selecting the yaboot
file on the Firewire drive at the Open Firmware prompt. Booting goes OK, but
after the installer has asked for language and keyboard settings, and wants to
get more data from the CD, it complains that it cannot find any mounted CDs..
Tried to repeat the booting with the 'dofirewire' option, but with no effect.

So I'm wondering if it's possible to tell the installer to ignore the broken
internal drive, and look into the external one?

Thanks for any help!
Denis

ps: out of curiousity I tried to load a kubuntu 6.10 live session the same way,
and it works, so I guess that in theory this should be possible with 
Etch too, or not?