Hiya,
unfortunately, when George packed G.R.U.N.T.S. some files were not properly packed and are thus missng from the AU zip file.

I uploaded a fixed version to my server that includes the missing files (unpacked) so please, download THIS version of the game.

Maybe George can update the AU file with my newer version?

http://www.icevalk-entertainment.com/G.R.U.N.T.S.Demo.zip