wrc double key binding

I play EA WRC and need double key binding for keyboard. I want to manual sequental gear change using double key binding. Example I want to Gear Up with "A"+"Space" and Gear Down with "Z"+"Space". in another racing game there this kind of double binding and I kind like it for manual gear up and down

For information I use

- "A" Accelerate

- "Z" Brake

- "X" Handbrake

- "," Left

- "." Right

and another keys as view change and others

Please consider for doube binding keyboard key for control