cloning OS9 disk ?
 

Here is what I'd like to do on a os9 PowerBook :
Start from an external osX Hard Disk, launch SuperDuper! from there, clone the OS9 Hard Disk to an other partition of the external Hard Disk.
Can I do that with SuperDuper! ? Does it manage cloning an OS9 DD that way ?
Thanks.

That sound work, yes, as long as the drive is formatted as HFS+ and you've got your partitioning set up so that it would work with a regular OS9 install.