I am looking for a simple npc hair replacer that replaces female and male standard hair styles..... I know there's alot of hair mods out there but none that I know of actually just replace and or upgrade all the female and male hairstyles. Or am I missing something? Any suggestion and or push in the right direction is very appreciated

I'd suggest Apachii... that seems to be the most all-encompassing right now and continues to be updated.

I second the Apachii suggestion. It offers a wide variety of hairstyles ranging from anime to punk to very realistic, sensible hairstyles. It's a must in all my games. http://skyrim.nexusmods.com/mods/10168