current won't boot on OSX/Parallels (can't find filestore in wd0)

[George Michaelson <ggm%pobox.com@localhost>]

I have a working 5.0 install on OSX/Parallels, but when I upgrade it  
to current, the kernel stops finding a working filesystem to mount.

What have I forgotten? I unpacked stand/ to get the modules hierarchy,  
and I used a pax/tar --unlink type sequence single-user to get the  
binary/lib state  unpacked. (this always used to work fine)

A 5.0 .iso image sees the filesystem fine.

-G