Cairns Offroad Training & Tours replied:

If you select 4wd high or low range without locking the hubs you will still be in 2 wheel drive. In simple terms locking your hubs is what conects your front wheels to your 4wd drive train. With your hubs locked you can move from 4wd to 2wd on the move, you must stop to move from high range to low range. Cheers Rob

Alpaca replied:

Peter,
No.1 priority. Join a 4WD Club.or engage in a course similar to what the previous contributor runs. You can then get out into the real country with confidence and safety. I presume most clubs have accredited driver training. Visit several first before you join (if available) to check out which club suits you. Goodluck Alpaca