I altered this headmorph to accept changing hairstyles as well. I use ElysiumFic's dlc hair mods that can be changed at anytime durring the game without having to use the Gidded editor. All you should have to do is drop the hairstyle you want into the dlc folder of Mass Effect 3. It works for me with no problem.
Also the hair will change color depending on the light. It will look black, blue or red. Sorry about the words in the images, I like the subtitles.
You can download the headmorph from here
or my nexus site once I upload, I will reedit with the link
You will NEED a hair mod from here... www.nexusmods.com/masseffect3/mods/425/ but you have plenty to choose from.
You shouldn't have to alter anything for the hair besides moving the file you like into the dlc folder of Mass Effect 3.