I need to revise this 5 year old post to say "YAY FOR SHARPKEYS!"
I have a laptop with a few non-standard special keys, and some extra copies of keys in the keypad area, but none of these can get captures by normal hotkey triggers.
I'm now using SharpKeys to map my CapsLock to a different catchable key, and remapping those useless keypad/numpad area keys to PrtScr and Break like keys, so I can easily trigger my FARR and Screenshot Captor applications.
Great stuff, thank you SharpKeys.