Remap TAB-Hotkey for Quaddraw (being left-handed)

Dear friends.
I am lefthanded an am using a wacom tablet left-handedly. This makes Quad Draw functions unreachable for me. As severly impaired person I have no possibility to use right hand to fire tab-hotkey. For many general hotkey actions (ZBrush, …) I have Windows Registry tweaked for example to have Alt-Key on Right-Alt … but I cannot remap from windows-side because I need TAB behaviour for Coding. But I cannot find a possibility to have QuadDraw TAB remapped … Thank you soooo much for help!!!