MIME frustration - send all outside

[Andy Glew]

I am somewhat frustrated with my Gnus handling of multimedia email.

The basic types, such as 
   application/msword;/home/glew/bin/bin.cygwin/windows-run %s
   text/html;/home/glew/bin/bin.cygwin/windows-run %s
are working - windows-run is a script that 
basically runs Internet Explorer, since I am working on cygwin.
(Relying on IE's use of the Windows filetypes database
to invoke the correct viewer.)

But I can't get things like 
   application/octet-stream;/home/glew/bin/bin.cygwin/windows-run %s
   application/x-zip-compressed;/home/glew/bin/bin.cygwin/windows-run %s
to work.

They work fine when I do operations like (from a Gnus Article buffer):
    v runs the command gnus-mime-view-part
    Interactively choose a viewing method for the MIME part under point.

but when I try to have the default action
    RET runs the command gnus-article-press-button
    Check text at point for a callback function.
    If the text at point has a `gnus-callback' property,
    call it with the value of the `gnus-data' text property.

I always get asked to save the file; my viewer doesn't get
invoked.

(Actually, I would just be using "v" to invoke my viewer, xcept that,
for some reason I have not yet been able to figure out,
gnus-article-press-button invokes the viewer in a decoupled manner,
essentially backgrounded - I can use emacs while the viewer is active
- whereas gnus-mime-view-part blocks emacs until the viewer exits.)


I have tried
   * adding rules to ~/.mailcap
   * adding stuff like the following to ~/.emacs
        (mailcap-add  "application/x-zip-compressed" "windows-run" "/bin/true")
        (setq mailcap-mime-extensions (append mailcap-mime-extensions '((".ppt" 
"application/postscript"))))
but nothing is working - something, somewhere, is taking priority over
what I specify.


Q: can anyone tell me how to get EVERY attachment (MIME part) viewed
with an external viewer like my windows-run?

(Once I can do that I'll back off to internal viewers for things like
text, and maybe HTML since I use w3m.  But, right now, I'd be happy if
I could just see everything.)



----



(emacs-version)
"GNU Emacs 21.2.1 (i686-pc-cygwin, X toolkit)
 of 2004-03-22 on cm-test"

(gnus-version)
"Gnus v5.9.0"

cygwin version downloaded a few weeks ago (can't find the version
number right now)