This is the most confusing part for new users. There is no single "official" Kinect Sports Ultimate Collection digital download on the Xbox Marketplace. The "Ultimate Collection" was a that included:
On an RGH/JTAG system, you should ensure that both game folders are indexed by your custom dashboard ( Freestyle Dash kinect sports ultimate collection jtag rgh install
is plugged in and updated via the official system settings before launching, or the game will prompt you for a system update that could interfere with your custom dash. Are you planning to transfer these files over or are you using an external USB drive for your game library? This is the most confusing part for new users