[sahbi]

hello everybody,
I got a Kobo aura h2o, and I am not satisfied with the default pdf reader, after some digging I came to the conclusion to install the Koreader, I want to use it to read mostly Programming books. I already made my way through many posts here , and now my question:
which way is the less invasive to install it ? someone could also say the cleanest way.The only functionality I want to have is to start koreader from an icon on the home screen, and I have no interest to install anything else.
it would be great if a connoisseur will help me do that.
(Actually my Kobo is running fw 3.17.0 )
and thanks in advance.