But probably you will need to invest more work before it becomes interesting to play.
Firstly, it needs a good scenario. As you say yourself, "decent objectives turn a good map into an excellent one" - I could not agree more, and others in this thread have said the same.
Secondly, the map scenery is a bit drab, the terrain is jagged and unsmoothed, I think Tomas spent only a day or two working on it, it was his last before moving on. So, like Snoopy suggests, for inspiration you could have a look at Bobby's Austrailia, which has nice scenery and excellent reskinned rolling stock. One of the best-looking prototypes for this type of continental map is "America" by Stormfather.
Thirdly, there is the important issue of stability of this Australia map.
- As Snoopy suggests, the .fpk file should be unpacked and only the necessary files kept in a single subfolder in the map folder.
- As with many old SAM maps, there is no RRT_EVENTS file, which will crash the map sooner or later.
Good luck and much success!