Custom Commands on pressing Home- Button?

Hey there!
This is my first thread, and I just registered, so yeah...
Hello...

Anyways, I hope you can help me with this Problem:

I just rooted my "Samsung Galaxy Tab S 10.5 WiFi".
I got SuperUser, TWRP etc, and installed some basic first Apps for Root stuff, like changing the language and deinstaller and whatever.

But now to my actual point of this thread:
I dont want S Voice to open when I hold down my Home- Button, etc etc.

I want to put custom operations on it, like: "Open [custom App]" when pressing on it, or "Go to [settings]" etc.
Is this possible in some way?

I mean, I use lollipop (5.0.1 ~) and yeah....

Can someone help me with this? Or do I have to take a custom rom or something?

thank you in advance!
Sunburst275