How do I run netbsd ofppc under psim simulator?

[nldudok1 <nldudok1%olifantasia.com@localhost>]

Hi all,
I am trying for a while now to boot a ppc netbsd kernel under the psim 
simulator but I can't get it to work.
Can anybody tell me what I need (versions and configuration file) and 
where to find it.
Most information I found references dead ftp sites. Especially I don't 
know what hardware  tree to use. And how to compile and invoke ofwboot. 
The only version I have that doesn't crash rightaway complaines about no 
dma in the ide controller and then dies.

If anybody is still on this list, please say something.

Thanks in advance,
Martin