Portal 2 Sixense Perceptual Pack with Oculus Rift S
While the MotionPack was easy to do, the dll isn't compatible with the perceptual pack stuff since it wants to use a camera instead. Luckily, you can transfer the sixense folder to normal portal 2 and replace the binaries with the one from the motion pack and it works fine. Also, the camera is supposed to be locked in place the whole time, but it unlocks after a video.
A bit of a better explanation of the process I had to go through can be found in my MotionPack Video
• Portal 2 Sixense Motion Pack Singleplayer ...
A link to the SteamVR driver for sixsense can be located here: https://github.com/CrossVR/Hydra-OpenVR