[Installation]
Unzip the file. Drag and drop the Data folder and Skyrim folder into your skyrim game directory. (steam/steamapps/common/skyrim/).

[Advanced Install]
If you don't want to overwrite your skyrimpref.ini, simply add:

[Havok]
fInAirFallingCharGravityMult=1.35

to the end of the file. This is REQUIRED! Otherwise you drop like a stone when you try to fly.

[Uninstallation]
Delete BatTravel.esp as well as the scripts that were in the zip file.