Because it was giving me sooooooo many troubles to do it that way because of a mistake i was making. Plus I had to improvise a little bit because I'm on a Mac and that guide is just for PC.
But in the end it worked, and I'm happy with the result! -
http://goo.gl/WpmFuL
Too bad you can't have original and modified both installed on your phone.
Just one last thing... I don't want to remove the ads, but I'd like to know if it's possible to just show them when connected to a WiFi network. I don't want the app to use my data anytime I'm playing. And no, putting "Airplane Mode" on is not an option, as this will block any other apps that I do want to use my data.
Thanks!