David, thank you & PMJI,
I am trying to avoid this very problem in multiboot comps,
but even the theory is unclear to me.

>> $ /sbin/installboot /dev/wd0a /usr/mdec/bootxx_ffsv1
Doesn't this install the NetBSD bootloaler MBR?
Won't Linux remain unbootable?

$ cp /usr/mdec/boot /boot
That looks better... does this rebuild the chainloader
into the boot sector of the NetBSD partition?
(Assuming this was Joe's issue).

David, Joe,
Where do I stipulate "please don't mess with MBR & put loader
in your own partition's boot sector, will you?" at install time?
(I can't even find this in any of the Scriptures...)
 
Filippo