Only riverworld (valhalla) tags are modified, making it compatible with any mod.

INSTALLATION
Backup your tags.dat in order to revert the modifications if something goes wrong or you if you want the default Valhalla.
Just extract the contents in the /maps folder and install using the .bat .
HaloOnlineTagTool is included to allow the installation of the tags.

Ingame pics :
First person view.
3rd person view.
Inside the base.
Flying with banshee.