Two things about the grass mod; first I'm getting a lot of missing meshes, here are my warnings for it:
Model Load Error: Meshes\Grass\Vurt_GreenGrass.nif cannot load file in Meshes\Grass\Vurt_GreenGrass.nif.
Will use the default object Marker_Error.NIF.]]
Model Load Error: Meshes\Grass\Vurt_Ash_DeadBushy.nif cannot load file in Meshes\Grass\Vurt_Ash_DeadBushy.nif.
Will use the default object Marker_Error.NIF.
Model Load Error: Meshes\Grass\Vurt_Ash_GreenGrass.nif cannot load file in Meshes\Grass\Vurt_Ash_GreenGrass.nif.
Will use the default object Marker_Error.NIF.
I did download and install what you linked, I even redownloaded it to make sure that I didn't end up losing something. Still nothing though. I'm guessing those were renamed at some point?
The second thing, as is it does conflict with what I am do with my island, I think the screenshot should explain everything. So, for this I'm just wondering what are the plans for conflicts such as this to be worked out?
-----
And on a side note, out of curiosity, when making a grass mod such as this, do you need to hand place everything? Or is there an easier way to do it?