Hey TOY W4RRIOR, there is an easier way to accomplish the same thing without changing files.
Personally I changed my "A" from Targeted Attack Move, to just Attack Move Click.
The difference between the two is that the previous setting brings up a crosshair to click on a target.
The new setting will automatically walk and attack the target closest to the mouse, if there is no target close to the mouse, it will attack the first target in range of your auto attack.
So for example when I ADC, I walk around pressing the A button instead of clicking because it will attack no matter what. It a better than default right clicking because you dont have to click on the person and accidentally hit the ground.
In addition to that I removed my "S" binding so that I could use my originally Target Attack Move binding on minions.
For kiting forward or back I press A then i right click in the direction I want to walk (forward or back) then quickly press A again. Most people dont realize that is make a huge difference in being a good or bad adc. The closer you stay to a dying target the higher chance you prevent to from flash away.
TL;DR
Change "A" Key to Attack-Move-Click
A+Right click to Kite
PS: Learn to do this with melee to lead your target while you melee them. Especially 
