>   | dd if=/dev/zero of=myboot.fs count=5760
>   | vnconfig -t floppy288 -v -c /dev/vnd0d myboot.fs
>   | disklabel -rw /dev/vnd0d floppy288

 I found that the 2.88M floppy images failed on one computer I had.  No errors,
the machine just went on to test the next boot device in the BIOS search path.
Sorry, I can't remember which vendor or how old the machine was, but all I had
around at the time were Compaqs and a Toshiba.  The 144 floppy image worked
fine.

>   | gzip -v -c -9 $KERNEL > $MOUNT/netbsd

 Don't forget this in the kernel:

config          netbsd  root on cd0a type cd9660 dumps on none

> mkisofs -v -v -o /path/outpu.....

 I mounted /usr/pkg and /usr/X11R6 onto my root before running mkisofs, and
then used -exclude-list to remove a lot of large crap I wouldn't need on a
read-only system, like '*.a' and 'games'.  Looks like I also excluded
'cat[1-9]' but I can't remember if that did what I wanted...