How do I change the SteamVR transition screen that appears when you are changing applications

The project I am currently working on requires me to launch another VR game from my game. The game I am using is The Lab. So far I am making so when I press a button (with the vive controller), it launches the other game and my game stays running in the background. But it takes me to this blue loading space with a overlay that says "NEXT UP". How do I change that environment.