To install: Don't bother unzipping - There's no need
1. Open Blender
2. File -> User Preferences
3. Click Add-Ons Tab
4. Click Install from File at the bottom
5. Find the zip and double click it.
6. Check the little box next to Object: Avastar to activate
7. Hit Save User Settings at the bottom
8. Congrats you now have Avastar!
