This skin replaces the Night Elf Runner (and Spirit of Vengance) or the Night Elf Sentry. Because the weapon and scrolls are alphaed out for both models, they look identical with this skin over them, portrait animations and everything. If you wish to use more than the two skins for the above mentioned models, you can make the sentry or runner use more than one skin via the technique explained in this tutorial.
Tutorial Link
The three primary posses in the screenshot above were taken with lighting/shadows disabled, because the face of the model has an awkward way of being shaded (the portrait model does not suffer from this).
The weapons have been alphaed out because it will allow the attachment of any weapon. If you don't know how to attach weapons to models you should check it out, it's pretty awsome. You can browse through the attachments in the model section to find a weapon (or weapons) more fitting for this model.
Keywords:
Battlegrounds, Armor, WoW, Night Elf, Night, Elf, Sentry, Human, Female, Warrior, Paladin, Lamellar, Lieutenant, Commander, Knight, Footman, Sentinel,