Xex Menu 1.1
Grab this, extract it, and put it on a usb drive.
Plug it in to you xbox and go to file manager in fsd.
Open Hdd on one side and Usb on the other.
Highlight "Content" folder on your usb drive and hold the bumper for the hdd side (If the Hdd is on the right - Hold the Right Bumper) and hit A.
After it copied to your hdd, go through the folders to that one file, which is xexmenu.
You can launch it by clicking on it.
Have you tried multiple games?