conditional position/geometry?

Greetings,

I've recently been blessed with a new display at my work desktop, and
am adjusting my X-Windows environment to a higher resolution.  Been
running at 1280x1024 at multiple locations for well over a decade,
and shifting to 1600x1200 at one of them without having everything
look tiny is a high priority now.

Since I'm still using 1280x1024 at home, I'm using the "xrdb" facility
for conditionals to choose different font settings in X resources based
on the resolution of the X display.

One challenge has been that exmh stores its geometry values (window positions
and sizes) in its exmh-defaults file as absolute pixel values, with no regard
for the resolution or size of display.  I've mostly worked around that by
telling exmh to not try to remember these geometries, but a couple of items
have so far eluded me.

(1) The font used in the folder list area seems to be "fixed", and also
    seems to not be responding to changes in the X-server's resource db.
    I have a "*Font: blah" in there, which is picked up pretty much
    everywhere else in exmh, with the exception of the flist area.
    Any suggestions on what resource will control this?

(2) The default size of the overall exmh window is wider and shorter than
    I care for.  Ideally, it would track the "message" area size preference,
    but it does not appear to do so.  E.g. I'm getting a message area of 85
    columns wide by 24 lines high, when Preferences->Windows&Scrolling lists
    80x25, and changing settings there make no change in the message area.
    [ Note:  I'm not using a detached message area. ]  Any ideas on where
    one could set this?

Thanks and regards,

Marion