Installing Lenny on PowerMac?

[Rick Thomas <rbthomas@pobox.com>]

I have a temporary need to install Lenny on a PowerMac G4 so I can run  
some tests on a "fresh" installation for a user who is unable (for  
various reasons) to upgrade to Squeeze at this time.

When I run the netinst installer CD all seems well until it wants to  
setup sources.list.  Then it dies claiming to be "unable to determine  
code-name for release". (I don't remember the exact wording of the  
error message, but the intent is clear.)

Is there a work-around for this that would allow me to do my testing?

Would I have better luck with a DVD, where I wouldn't need to get  
anything from the network mirrors until after the installation is  
complete?

Thanks!

Rick