An AutoHotkey 1.1 script that converts your CTRL/SHIFT keys into toggle keys so that you don't have to hold them to crouch or sprint in games. Both keys are mutually exclusive.
You can run the script from anywhere. Make sure "CrouchSprintToggle.ini" is in the same directory.
Please read "CrouchSprintToggle.ini" for more information about setting up the script.
Shift: toggle sprint
Left CTRL: toggle crouch
Left CTRL + F12: pause the script (disable all hotkeys)