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!
OK, not that long, but the more thinking and time is invested, the smoother it gets!
If you have an interest in modeling I can't recommend getting on there enough. Also, there is a community pool of all the custom engines, buildings, etc.. It's easy to plug them in your map.