Modifying body of select message in a 'mbox' file.

[Cowmix]

Well.. I hate to reply to my own post.. but here is an update..

When I flatten a 'mbox' mail message and suck it into a 'email' mail
message.. things look fine except that every MIME encoded section has a
'UNIX From' header added to the top of it.... and the From user is set
to 'nobody'..

Does anyone know why this 'From' header is added to every MIME encoded
section in the body?

thanks!