Alternative to WASD

hello im new here. also, i am new to pc gaming. i dislike the WASD movement but i like the mouse aiming. how do set up Call of Duty to allow for me to use my xbox controller to move but my house to aim? or does anyone have any suggestions for alternatives to WASD? i bought the razer tartorous(sp?) and the thumb joystick sucks so i am back to square one. please and thank you