> I build a restore cd using Izumis scripts from:
> ftp://ftp.netbsd.org/pub/NetBSD/misc/tsutsui/cobalt/

Just FYI, I've updated restorecd script for 4.0
(and remove obsolete 4.0_RC4 iso image):
ftp://ftp.netbsd.org/pub/NetBSD/misc/tsutsui/cobalt/restorecd-20080121.tar.gz

See README and CHANGES files for details:

New Features:
-------------

 - 4.0 release kernel and userland
 - newfs_ext2fs(8) binary backported from -current instead of Linux mke2fs

Fixes:
------

 - update README for 4.0
 - paneld binaries recompiled on 4.0 environment
 - patched fdisk(8) binary to avoid "Trace/BPT trap" failure
 - add symlinks to CHANGES and instructions.txt

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Izumi Tsutsui