So, I wanted to get Themes, Avatar Items, And Gamer Pics, sooo I got a USB Drive, formatted it to Xbox 360, And put some things I wanted on my Xbox on there. And I was hoping for that worked, and.... Themes worked! (Well, kind of.) Some themes are just default background or last used background, so it didn't work, while some themes actually worked. (For example, Jeep Theme doesn't work, but Dr. Pepper Theme worked) Gamer Pics works by injecting it, Thanks to Horizon. And the avatar items, it did not work at all, it says it's corrupted and I don't understand why tho? This is kind of getting annoying now, and I'm trying to fix this for days now, Any help at all? Thanks!
A lot of content is not DRM free, so will only work on the console that downloaded it, unless your 360 is Jtag / RGH hacked. Anything that shows as corrupted will have been modified to work on a Jtag / RGH console, this breaks the digital signature, so shows as corrupted on a non modified Xbox 360. Some themes not working / some working will be for the reasons mentioned above. I think most of the DRM free premium themes released over the years are posted here: https://digiex.net/forums/themes.63/ - you will also find a sub section for user created themes which also work on any console.
I actually found a solution to the Avatar items problem, I just need an Xbox Live account, and copy my xuid into to avatar item downloader, and I actually got my stuff! Also, Thanks for telling me that InsaneNutter! But uhhh, I think I'll hardmod my Xbox later