Assuming you have the creation kit, open that up.
Once you got the creation kit up,
click the open folder box in the top left hand corner.
Select the "Skyrim.esm"(don't make it active, just put the check mark by it),
then select the Apachii.esm(also just put a check by it, don't make it active".
Then scroll down and find my "apachiihairstyles.esp" and set that file as active,
then click OK

.Click "yes to all" in the Warning box. Wait for loading to finish then open the "Object"window if not already open.Click on +box next to "Actor". scroll down to the nord race,Click on the first name in the list,hold down "Shift key and arrow down on keyboard to highlight EVERY npc in the list in the object window then press ctrl f4.
It will bring up a dialogue box asking to export face gen data, select YES. After this, since there are so many files you're exporting it's going to take a minute(find something else to do while it finishes)
and yes.. Your creation kit will hang, and seem to not respond, but only because it's working.
When it's done it will bring up another dialogue box telling you it's done, click OK on that.
Then do the very same thing for the Imperials.
Once that's finished DO NOT CLOSE OUT THE CREATION KIT
Navigate to your skyrim folder. Go to Data\Textures\Actors\Character\FaceGenData\Facetint\Skyrim.esm, and delete ALL files from that folder. Close out of the window
Click save in the creation kit, then close out the creation kit.

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To fix the elves open up the creation kit again
click the open folder box in the top left hand corner.
Select the "Skryrim.esm" (don't make it active, just put the check mark by),
Then select the Apachii.esm(aslo just put a check by, don't make it active)
Then scroll down and find my "apachiihairstylesELVES.esp" and set that file as active, then click OK.

Once you've done all of that, scroll down to the Dark-Elves race, high-light every NPC like you did above with the Nord Race and press CTRL+F4
A dialogue box will come up asking to export face gen data. Select YES
Once that's finished click OK on the dialogue box that comes up.
Do the same things for High-Elves, Woodeleves, and Vampires of each race.
Navigate to your skyrim folder and go to "Data/Texutres/Actors/Character/FaceGenData/Skyrim.esm" and delete all files in that folder.
Go to your creation kit, click save. Then close out of the creation kit, and it's ready to play!