to make it works : open photoshop or something that u have.
go to wc3 viewer export any tile take the name and copy into a txt file or u can just memo it ..
open the tile exported with photoshop or something that u have.
open your tile with any program that u have (photoshop)
first thing copy your tile and paste to the exported one.
now save the exported file .
go to wc3 viewer convert tga-blp.
open world edit; import manage(f12); import the file (blp); repath the name
for the txt (name of tile exported); close the we or weu; open again;
done now find the tile in custom paths and it's done

if u didnt get yet u have another problem.