Description:

I’m left handed and I use my left hand to control the mouse and the numpad to the power keys but in ME1  that’s not possible
(normally) so I’ve gone into the BIOinput file documents and added them and this doesn’t change them,
if there linked to say the number keys above the letters

Install:
Open up BIOInput located in:  Documents/BioWare/Mass Effect/Config

Copy the codes to the bottom of the section of the config file titled: [BIOC_Base.BioPlayerInput] 
Save the info and run the game and your power tray is now synced to the numpad keys
Naturally if you have your nomad keys assigned to something else you’ll want to erase that settings

Bugs:
On the power tray where it has the numbers, the number 1 has been replaced with an ‘N’ I don’t know why