>I created the partition by MacOS disk utility, and install NetBSD
>afterward, but not with sysinst. I did by manually.

It is the same to me. Im now going to do the install on my PB G3 
manually. The installer kernel does recognize the Apple Partition 
Map. So at the moment mine looks like this (disklabel wd0:)

#        size   offset  fstype [fsize bsize   cpg]
  a:  2315679   7198581  4.2BSD     0     0     0 # (Cyl. 7617*- 10067*)
  b:      512       320 unknown     0     0       # (Cyl.    0*- 0*)
  c:  9514260         0  unused                   # (Cyl.    0 - 10067)
  d:      512       832 unknown                   # (Cyl.    0*- 1*)
  e:  4520142      1344     HFS                   # (Cyl.    1*- 4784*)
  f:  2677095   4521486     HFS                   # (Cyl. 4784*- 7617*)

Im going to create two further partitions for /usr and swap via pdisk 
(the version from Bob Nestor 
ftp://murphy.dyndns.org/pub/map/pdisk.sea.hqx) and will then install 
NetBSD manually.

>newfs
>mount
>tar zxpf  ( I am not familiar with pax.)
>MAKEDEV
>/etc/fstab
...

I would be grateful for any details on manual installation procedure.

If I get get this thing up and running thru a manual install, I will 
definitely write an How-to and post it to port-macppc@netbsd.org.

Cheers, Chris