Have you tried 'man setleds'?
In addition, you might want to edit your $HOME/.Xmodmap and put the following lines in:
! redefines numeric keypad to be used without NumLock keycode 79 = 7 keycode 80 = 8 keycode 81 = 9 keycode 83 = 4 keycode 84 = 5 keycode 85 = 6 keycode 87 = 1 keycode 88 = 2 keycode 89 = 3 keycode 90 = 0 keycode 91 = comma keycode 86 = plus ! deactivates NumLock key keycode 77 = |
Other possible alternatives:
xkeycaps: right clicking should allow edits. May have to do this as root.
"man XF86Config" and look under section Keyboard.