While I still haven't been able to get everything working, I thought I 
would point out this little tidbit.  I'm not sure about NetBSD, but on 
my FreeBSD 3.1 server, I found that the only way to get the PowerBook to 
use the proper root path (rather than /) was to use ISC DHCP 2.x 
_instead_ of BOOTP.  Using DHCP I managed to get the PB to load the 
kernel, mount the proper root path, and actually run as diskless NetBSD 
system.  

The problem I still have though (and have about given up on) is loading 
the GENERIC_MD kernels.  When I try to boot one, it simply locks up the 
PB (w/netbooting) or just gives an "input/output" error (using CDROM).  
Thus I have no method of installing NetBSD since the kernels that I can 
boot lack sysinst.

Anyway, you might look in to DHCP (the configuration isn't much more 
complicated than BOOTP) and see if it makes any difference.

--
Edwin Rudolph
stu12915@westga.edu