forcing a popup to KDE and GNOME users

[Rohit Kumar Mehta <rohitm@engr.uconn.edu>]

Hi, I would like to force a Java popup window to all users who start an 
Xsession on our Debian boxes.
We currently have kde and gnome installed, and neither of them seem to 
run commands from /etc/X11/xinit/xinitrc (even when the user does not 
have a .xinitrc).  I am having some small success
modifying the /etc/gnome/default.session, but if the user has ever 
logged into gnome, there will be
a ~/.gnome directory and it will not use this information.

Can anyone suggest a better way to make this popup appear?  We just want 
to give our users some information with the Windowmanager splash.

Thanks,

Rohit