Hello,
I need to upload a small patch to github and modify a bit the wiki page, but now I can confirm that the updated import procedure allows to install a fresh system. I've been able to install debian lenny in a nearly unnatended way, disturbed only by questions about extra drivers disk (it was a laptop with unsupported wifi), and disk formatting (which I forced because it holds multiple runnable systems and I didn't want to brick it).
There are a few rough points which are not cobbler faults but maybe debian installer ones or specific from my own setup, but the actual deployment was right.
I'm on the way to test deployment of virtual machines with koan, but as far as concerns real machines I'm happy, and also exhausted my test infrastructure.
Javier Palacios