The original GRF completely removed the "Purchase Land" sign and brown tiles from the game (which is all I wanted to do - personally

However it turned out that a few people wanted to get rid of the brown tiles, but still keep the sign ... so I quickly knocked up another GRF to provide for this preference.
But obviously, providing two separate files to do essentially the same thing is a pretty clunky way of doing things!
So I have now created a replacement file grassyknoll.grf, which provides both options via a player-set parameter in the NewGRF menus.
1 = no brown tiles, sign on.
None (default) = no brown tiles, sign off.
So now people can choose whether to activate the sign or not.
The amended file has been added to the first post in the Grassy Knolls thread.
I have also substantially rewritten the first post in that thread to reflect these changes.
Anyone with no_brown_tiles.grf or yesterday's grassyknoll.grf can delete them, as they will find this new file does the job of both.
Thank Q!