Motor Accessibility: Window Cursor capture and student who uses head tracking gyro mouse for access

I work with a student who, due to motor disabilities, uses head tracking with a modified gyroscopic mouse to interact with onscreen elements. The way the cursor is bound to the game window during gameplay prevents her from playing independently. The way she games is through hovering over interactive tiles onscreen that are associated with keystrokes. It would be nice if when we move to the "Fully Keyboard" mode we could have the option to retain control of the mouse during gameplay. Dale