NOTE: This tutorial is a part of a longer guide - to have full understanding of what is going on in this tutorial, make sure to go through VRidge Basic Tutorial.
Press "Play SteamVR Games" in RiftCat client to make sure that SteamVR driver is running. Start the game in Steam and then click "Launch" in the Elite Dangerous Launcher. Once the game launched go to Options, and then Graphics. Navigate to 3D and select either HMD (Headphones) or HMD (Speakers), whichever you are using.
If your headset is using uncommon settings expand 3D settings where you can adjust 3D Separation, and 3D Focal Distance to your liking.
Elite Dangerous has a known issue of having problems with text readability. To improve it, go to Config in RiftCat client then VRidge settings, Advanced Video settings and increase Render Scale. Note that Render Scale greatly reduces performance, so if you have noticeable FPS drop in the game reduce Render Scale a bit.
Now you are ready to play and enjoy Elite Dangerous. You can control the game the same way it's being done traditionally. You can also rotate your head to look around. Have fun in Elite Dangerous with VRidge!