mhshow questions

I think the answer is "No" to both, but ...

1. Is there a command-line option to override the mhshow-show-blah/blah
entries in .mh_profile ?  It seems like overkill to edit the file every
time I have a one-off need for a specific program.

2. Is there an option to process all of the parts at once, rather than
one at a time?  Sometimes it's nice, when an email contains 2 images,
or an HTML file with embedded (not linked) images, to see them both together.

Thanks.

--hymie!