As said, now to be clear:
I've tried the normal way in the settings, it wont register my pressing lctrl on its own
I've tried using the config file, making Crouch be lcontrol, it shows it working on the main menu settings area but blanks out ingame
RIGHT control works fine, and I've found that left shift also wont bind alone. I know the solution is simple as stuff but I cant find it. Assistance would be grand. Thanks in advance.