Note that a lot of games have a startup file called "ViveportContent.exe". Double click on this file to find out the name of the game this will start. Then right click and hold that file, and drag it to a folder where you want your game icons, and click "Create shortcut here" in the move menu. Give your new shortcut the name of the game that it starts. I have all my Viveport startup icons in a folder I called Viveport VR. Similarly, I have folders for Steam VR and Oculus VR.