Installation: Put pak666_Birdman_HD.pk4 or pak666_Birdman_Vanilla.pk4* file in your Doom 3\base folder. *You can't have both at the same time because they use the same naming convention. Pick only one. To uninstall delete the .pk4 file. Beta1 Some changes are needed to fix some animation errors. The version of Hell Knights from the Hell levels still need textures.