Many years ago, I put together a configuration which allowed many of my 
users to use the Jed editor in EDT emulation mode.  The configuration 
consisted of a VT100 translation table for the xterm application that 
made use the of PC keypad as an almost 1-1 map of the VT100 keypad. 
(The PC keypad has a single large + key while the VT100 keypad has 2 
keys at this coordinate).

The trick to this configuration was remapping the NumLock key with 
xmodmap.  I used xmodmap to translate NumLock to an unused X keycode, in 
particular, KP_Equal.  The xterm VT100 translation table then mapped 
KP_Equal to the Gold Key.

I'm unable to do this with SL4x.  Xmodmap's at X session startup are 
ignored.  Apparently, one needs to use the newer XKeyboard mechanism to 
remap keys.  I can remap it interactively after I'm logged in.  I took a 
stab at understanding XKeyboard, but it is poorly documented, at least, 
from a simple users' perspective.

I am hoping someone on this list has some suggestions.  I suggested 
folks quit using Jed, but that didn't get me anywhere. ;)