These textures are simply homogenous textures that will purely be used as such. The Biome compiler should handle the colouring from the MODIS map in terms of the Biome areas. The textures here are positioned at 12:00. At the end of the day there would be very little manual colouring expected as far as I understand, with an exception to a few places the MODIS map will be colouring as per this method.
Edit: the textures when created were created at the 12:00. However, the above shots differ to try to show the texture definition as 12:00 does not show this very well. Misleading in my above statement, sorry about that.
Cheers,
K.