I originally included an extra node attached to the head for the purpose of manually moving/scaling hair (surprise!) independent of the scalp/head itself, but for whatever reason, it ended up crashing the game whenever the player (or an NPC using the skeleton) got decapitated.

As I want the mod to work properly out of the box for as many people as possible, the node ended up being omitted starting with update 7/version F.

However, the entries are still in the slider files (there was no pressing need to remove them, and I use them myself), and the sliders will appear if the appropriate node is present in the skeleton.
It's not only for hair; it can also easily be repurposed to instead be used for any head accessory. Heck, if you wanted to, you could attach the node elsewhere on the body and use it for that, as long as it's called "CME Hair".

Again, keep in mind that with this node present, your game will very likely CTD the moment that you're decapitated. If you plan on dying to dual-wielders and axe-wielders (and probably two-handed sword wielders, I don't know) often, you may want to install a mod that prevents decapitations, such as this one.

The following is a temporary text placeholder tutorial on how to add the node to the skeleton, and will be reworked when I get a new hard drive with which to create a video.

• Download and install Nifskope, if you haven't
• If using a vanilla race, open the skeleton.nif/skeleton_female.nif, usually in \meshes\actor\character\character assets (or character assets female). If using a custom race, it will probably have its own folder in the \character\ folder
• If they're not already open, open the Block List and Block Detail panes with the buttons in the upper-right
• In the 3D view, click on something attached to the head of the skeleton; this will expand the block list out so you don't have to expand about 10 branches
• Now, look in the Block List for "NPC Head [Head]", right-click it, and go to Node > Attach Node > NiNode; this will create a new node and select it
• In the Block Details, look for Name (should be the second line). Click on the little "TXT" icon
• Enter "CME Hair", without the quotes
• Save the file
  

• Locate the nif for your head or headgear. This will probably be the hardest part, unfortunately.
• Open the nif, and in the 3D view, click on the white node that's in/around the hair or headgear
• Now, look in the Block List for "NPC Head [Head]", right-click it, and go to Node > Attach Node > NiNode; this will create a new node and select it
• In the Block Details, look for Name (should be the second line). Click on the little "TXT" icon
• Enter "CME Hair", without the quotes
• Save the file