landisk (Plextor) installation revisited

Hi, all,

I posted something back in October, 2008, when I first tried getting 
NetBSD/landisk installed on a Plextor PX-EH25L:

http://mail-index.netbsd.org/port-sh3/2008/10/03/msg000016.html

I didn't have a serial console because the pinouts for the other landisk 
machines wasn't the same as the Plextor (the TxD and RxD were reversed), 
and now that I have a serial console, I'm getting:

...
NetBSD/landisk ffsv1 Primary Bootstrap
Error: Can't open /boot.

As per my previous post, I ran installboot from an amd64 system with a 
directory with the entirety of NetBSD/landisk in /usr/dest-landisk/ by 
running:

installboot -m landisk -v /dev/rsd0a /usr/dest-landisk/usr/mdec/bootxx_ffsv1

It seems that landisk requires a stage two booter, so I updated this to:

installboot -m landisk -v /dev/rsd0a /usr/dest-landisk/usr/mdec/bootxx_ffsv1 /boot

Of course, I copied /usr/dest-landisk/usr/mdec/boot to the mounted 
filesystem first.

I've tried this several times, and I am now wondering if there's a 
difference between the way amd64 creates the filesystem and what 
NetBSD/landisk wants or expects.

Is there any limitation to the size of the partition from which /boot 
comes? Does anyone else have any ideas?

I was considering using an hpcsh Jornada 690 to do bulk package builds, 
but after seeing how slow that is (much slower than an Amiga with half the 
clock rate), I decided to revisit my Plextor...

Thanks,
John Klos