R's X11 Device Properties

Hello,

This is an issue that is at the interface of R, X, and my window manager 
(either icewm or openbox, both latest versions).  I am running R 2.10.1 on 
Ubuntu 9.10.

My goal: When an X11 device is started in R (e.g., by simply calling plot), I 
would like for the resulting window to be in the "always on top" state, and 
for focus not to switch to it.

Configuring this behavior is handled through the window manager, but both of 
the above referenced window managers require that the first element of 
window's WM_CLASS property, second element of window's WM_CLASS property, or 
the window's WM_WINDOW_ROLE property be set so that the right window can be 
matched.

If I start R, type

plot(1,1)

and then run "xprop" (command line program to inspect X window properties) on 
the resulting X11 window, none of these properties show up in the resulting 
output.

Is there any hope for this to change?  I did notice in ?X11 that "The 
standard X11 resource geometry can be used to specify the window position 
and/or size, but will be overridden by values specified as arguments or 
non-NA defaults set in X11.options. The class looked for is R_x11."

This "R_x11" class works fine for setting the geometry in .Xresources, but it 
does not seem to be the same "class" as WM_CLASS referenced above.

Unfortunately, this is about as far as my knowledge of X goes, so hopefully 
this makes sense. If anyone has any pointers, they would be welcome. Thank 
you!

Best Regards,
Erik Iverson