In some mail I received from Ignatios Souvatzis, sie wrote
[...]
>    However, I can boot NetBSD (a 1.0 kernel already on the system) and it
>    will find sd0, sd1 and cd0.
> 
> So you have won....

Urm, I should have mentioned that the kernel is only in the ADOS partition...
I've yet to get an installed root :)