http://www.mediafire.com/file/xeumdixmb ... d.rar/file
When downloaded and extracted, the file contains 2 folders:
Purple: This gives a bright purple highlighted tile, which is easily distinguidhable from the Line of Sight tile highlight.
Original: The original Battle Academy in range tile highlight graphics, in case you want to revert to the original effects.
Installation: All the above folders contain a Data folder. Just select the colour that you want to use, and copy and paste the Data folder into your Battle Academy main folder and overwrite the original Data folder. That is all you have to do!
My Data folders are set up with the correct internal folder structure to make things really simple for you, and it will place the Tile_inrange.tga in the correct place without you having to do any searching, just copy and paste the Data folder.
My folders only contain one file, the Tile_inrange.tga file, so none of the other Battle Academy files will be overwritten. If you do not like the purple highlighted tile, just install the Original folder.

cheers
Paul