keyboard keymap modification

[Barry Branham <bhb bbranham bestdsl net>]

I recently upgraded from RH9 to FC2 and the keyboard mapping seems to 
have changed.  Specifically the Alt_L key no longer functions as the 
Meta key in my favorite editor (Code Crusader).  If I execute xmodmap -e 
"keysym Alt_L = Meta_L", the problem is  fixed.  I'd like to have this 
mod done at login.  After reading the GDM configuration documentation, I 
followed /etc/X11/gdm/Sessions/GNOME to /etc/X11/xdm/Xsessions which 
indicated it would execute 'xmodmap ~/.Xmodmap' if nothing caused 
XKB_IN_USE to be set.  But adding ~/.Xmodmap gave a warning on login: 
'You have a keyboard remapping file ... whose contents will now be 
ignored.'  The menu preferences->keyboard does not offer the mod I 
need.  I see that xmodmap use is deprecated in favor of the XKB 
extension but I haven't been able to find documentation about out how to 
use setxkbmap to make this change.  I know I could just put an xmodmap 
command in .bashrc or something but I'd like to know if there is a 
recommended way to get this done on login.

Thanks for any help,
Barry