7780 CE and +/- Keys

I'm trying to remap the "CE" and "+/-" keys to "Home" and "End". Unfortunately, it appears the keys are duplicative to the "F9" and "Delete" keys on the keyboard. So if I use SharpKeys or Keyboard Manager in PowerTools it maps both keys to the remapping ("F9" and "CE" keys get mapped to "HOME" and ""+/-" and "Delete" get mapped to "End"). I'd like to keep the "F9" and "Delete" physical keys to the original state. 

Does anyone know how to do this? My search so far hasn't turned anything up. 

Thank you,

Christopher