FalmerBanes - Serana of Volkihar made by FalmerBane can be downloaded from Skyrim Nexus.
Every Skyrim player likes Serena so here is a simple modification for remodelling of Serena's skin. It have over 10,000 downloads and is well known among the Skyrim modding community. The latest version of the mod with step by step installation instructions can be found at mod page on Skyrim Nexus.