Help extracting mime parts from a message

Would somebody help me?

I need help in extracting mime parts from a message. In practice I often want,
not to invoke some program on a mime part, but to just store it a file.

I am forwarding an example Email. It contains a part, testzipfolder.zip. I would
like to store it a file -- preferably with a name of my own choosing, but I will
accept the name it has in the message. I don't usually want to run unzip on it
-- I can do that myself.

When try to run mhshow on it, it produces nothing useful -- it doesn't even run
unzip. I'm guessing that I ought to have a configuration file somewhere, maybe
.../nmh/etc/mailcap, that tells nmh about zip files.

I usually use a program, metamail, to do this. But the version I have often
dumps core. When I try to compile the current version,
ftp://ftp.research.telcordia.com/pub/nsb/mm2.7.tar.Z, I get a host and a half of
compilation errors.

I'm certain that nmh can do what I need. I just don't know how.

------- Forwarded Message

Return-Path: gatescad <at> gmail.com
Delivery-Date: Sat Aug  4 13:52:22 2012
Return-Path: <gatescad <at> gmail.com>
Received: from localhost (localhost.localdomain [127.0.0.1])
	by localhost.localdomain (8.13.1/8.13.1) with ESMTP id q74KqLYF005959
	for <norm <at> localhost>; Sat, 4 Aug 2012 13:52:21 -0700
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail1.rawbw.com