Oneshot/Onekill is right
Captain Nemo, completely manual targeting isn't very hard, once you learn the basics.
Come on over to the darkside and become a Disciple of the Wheel:
Everything you need to know how to make and use one of
Hitman's amazing wheels, including a comprehensive manual done by
klh, is in this thread right here:
http://www.subsim.com/radioroom/showthread.php?t=114351