After further testing, I can't get the Netherstorm tiles to work for the Lordaeron dirt tiles. It will change the image that appears above the brush list, but other then that there is no change. The icon is the same and it just makes the same regular dirt tiles.
I tried importing them to another tile but by doing that all my other tiles turned black like Abyss.
These tiles are really awesome so if you could fix them I will be so happy and grateful!!
Thanks for all your work so far and the hidden thread is very impressive