Booting G3 OF 2.4 from HDD

Hi!

I successfully installed Netbsd 3.0 to my G3-300 with Open
Firmware 2.4.
Right now, I'm booting ofwboot.xcf and kernel from the
network and 
touching the harddrive afterwards.

I installed NetBSD to Partition zero and now I don't know
how to use 
installboot, I guess.
First I copy one of the ofwboot-files from /usr/mdec to /.
But which 
one? ofwboot, ofwboot.xcf or ofwboot.elf? Do I install it to
/dev/rwd0c 
or rwd0a?

The only thing I have to do afterwards is "setenv
boot-device 
ide0/disk0:0"?

I'm sorry, but I am a little bit confused...

Thanks in advance,
  Michael Fuckner!