You need to go to https://www.google.com/url?sa=t&source=web&rct=j&url=http://www.saveeditonline.c... this is a save editor. You have to have a file manager. Save the game and upload whatever save file you want to edit on to the editor. It'll list a lot of values, but you're going to look for the value that says CHEAT(0/1) and set it to 1. That activates the cheat menu.