@SavageRabbit If you've already uncompressed anything to the wrong folders, you might start fresh. On assettocorsa\content\tracks delete any kyalami_2016 folder if present.
Then, open the latest kyalami_2016.7z with your preferred 7z or winrar program. Double click/open the kyalami_2016 folder inside it, and then you'll see two folders inside: "content" and "system". Drag both to your assettocorsa root, so it overwrites the already present "content" and system "folders". By doing, both track and Stereo's extra shader will fall into place.
Just my 2cents: the original kyalami_2016.7z could have content + system right on it's root, instead of under kyalami_2016\ to avoid distracted users decompressing it directly to content\tracks, as it can look like a main track folder name (before one takes care to navigate inside it).
Also, that image above could be confusing, as the
current track package doesn't include anymore the (unneeded) sdk shader files, and the system folder already includes the required "PerPixelMultiMap with Emissive map" for it to work, so no need prescribe it as a separate download for non csp/cm users.
Anyway, I guess after the 1.0 release, the main page instructions will be updated according to that package.