Makoto;
Thank you kindly for your help.

me:
> > /pci@80000000/@d/@2/@1:2,/netbsd: Device not configured

Makoto:
> The boot file string is to be read then by ofwboot instead.
> You have to use slash without comma.
> So it should look like
> 
> /pci@80000000/@d/@2/@1:2/netbsd

Ah, good eye -- thanks for the catch! I got the comma-'/netbsd'
from the install directions for 1.5.1_BETA2; probably just a small
typo there.

> But this not only the problem. It is saying not configured.

Yes, you are exactly right -- I still get the same 'Device not
configured' error.

> If I were you, I will watch the boot message while intaller
> boots. Write down the device name listed for your NetBSD.

From 'dmesg,' I get the following for the scsi drive which contains
NetBSD:

sd2 at scsibus1 target 1 lun 0: <QUANTUM, ATLAS_V__9_WLS, 0230> SCSI3
0/direct fixed
sd2: 8755 MB, 20907 cyl, 2 head, 428 sec, 512 bytes/sect x 17930694 sectors

The MacOS drive is 'sd1'
 
> By the way, it also be nice to look at the disklabel from
> the installer kernel (after booting from boot.fs).
> 
> What does it look like when you type
> disklabel sd0

So, if I run disklabel on my NetBSD drive (sd2 -- I assume this is the
right information), I get:

# disklabel sd2
# /dev/rsd2c:
type: unknown
disk: taxus
label:
flags:
bytes/sector: 512
sectors/track: 428
tracks/cylinder: 2
sectors/cylinder: 856
cylinders: 20907
total sectors: 17930694
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0          # microseconds
track-to-track seek: 0 # microseconds
drivedata: 0

8 partitions:
#        size    offset     fstype   [fsize bsize cpg/sgs ]
  a:    65912         0     4.2BSD     1024  8192     16   # (Cyl.  0 - 76)
  b:  2098912     65912       swap                         # (Cyl. 77 -
2528)
  c: 17938694         0     unused        0     0          # (Cyl. 0 -
20947*)
  d: 15765878   2164824     4.2BSD     1024  8192     16   #
(Cyl. 2529 - 20947*)

Thanks again for helping with this -- I hope this provides some clues.
Brad