Yeah i dont know anything about creating software or save editors or anything. But was wondering is there anyway u can create an App like Horizon or save editor for a specific game and have it connect to your console like Microsoft store or sites like EA Sports gameface and even with new games like WWE 2k15 has a site that allows you to import logos from your computer to the game. now when inspecting the site while open to my console via code u have to use each time u upload. but it has the 3 js like vender,and 2 other ones that send and confirms info sent back to your X1. So i was wondering if you could copy those js and other js from the MS Store like purchase a game and copy all the js info and add it to a software where u can send or edit games on your X1 like say u have a software that has your X1 info you put in and save & a list of X1 games with all its information stored on the software. and you can select what game or dlc content you want to download and when u click download it applies the js just like ms store calculates the value key and confirms purchase is complete with the info on your X1 u have saved.and applies the js that sends that info to your X1 so it'll be ready for you to install on the console.
Put it this way Microsoft Store Items- If spoofed = Illegal in every way, even if softmodded... Along with impossible without a Hardmodded Xbox Other items- if stored on your xbox- sure its possible just nobody has found the offsets for that game... if the item is server data (multiplayer) then Render it Impossible