If you want anywhere decent result, you'll have to use racemenu sculpt tool and edit vertexes. You'll like it but it takes time to learn. On the other hand, you can make what you really want, by investing as much spare time as you can. Haircut matters a lot, colors too.
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http://www.nexusmods.com/skyrim/images/631276/?
http://www.nexusmods.com/skyrim/images/635718/?
http://steamcommunity.com/sharedfiles/filedetails/?id=792942789