First i want to say that it's only for the Windows Xp users.
If u will go in start meniu --> accessories --> accessibility --> On screen Keyboard. Run thi little program and press with your mouse the ctrl button from the keybord after that just switch with Alt + Tab on your CO2 window. u will jump without pressing ctrl by your self. Very usefull if u are a smoker. .
Just a little trick but i hope it will help.