[MrE]

I check with http://www.motorhome.com/download-dinghy-guides/ to see which vehicles can be towed four wheels down. I don't see your LR4 listed, so it probably can't be towed 4 wheels down without disconnecting your drive shafts.
On my 2004, it's a matter of following the procedure and inserting a fuse. I put a fuse tap on fuse 37 and installed a LED rocker switch in the console so that I don't have to physically do anything except flip the rocker switch.
This is from the manual:
RECREATIONAL/MOTORHOME TOWING
If you intend to tow your vehicle behind a motorhome or recreational vehicle, follow the procedure specified for ‘TOWING THE VEHICLE ON FOUR WHEELS’. Failure to follow this procedure may result in damage to the transmission.

TOWING THE VEHICLE ON FOUR WHEELS

WARNING: ALWAYS adhere to the following procedure when towing the vehicle with all four wheels on the ground. Failure to do so could result in unintended vehicle movement or unanticipated vehicle conditions. When preparing to tow the vehicle on four wheels, it is essential that neutral is selected on the transfer gearbox - before attempting to select transfer neutral, ensure that the parking brake is properly and securely applied.

WARNING: DO NOT remove the key or turn the starter switch to position ‘0’ while the vehicle is in motion.

IMPORTANT INFORMATION: Your vehicle has permanent four-wheel drive and is fitted with a steering lock. The following instructions must be carried out carefully to prevent damage to the vehicle.

CAUTION: Leaving the starter switch in position ‘I’ or ‘II’ for extended periods will put a draw on the battery, which can lead to a voltage drop and ultimately to a discharged battery.

1. Secure the towing attachment from the recovery vehicle to the front towing eye of the vehicle to be recovered (see ‘TOWING EYES’, page 231).

2. With the parking brake applied, insert the starter key and turn it to position ‘II’.

3. Place the gear lever in ‘N’ (neutral).

4. Turn the starter switch to position ‘0’.

5. Insert a fuse (5 amps) into position 37 of the passenger compartment fuse box (see ‘PASSENGER COMPARTMENT FUSE BOX’, page 235).

6. Turn the starter switch to position ‘II’. The transfer gearbox will automatically select transfer neutral - wait until the message centre displays ‘TRANSFER NEUTRAL’. 7. Place the gear lever in ‘P’ (park).

8. Turn the starter switch to position ‘I’ (DO NOT turn the starter switch to position ‘0’). NOTE: The transfer gearbox is now in neutral and the steering wheel is unlocked. The vehicle MUST remain in this condition whilst being towed on all four wheels.
9. If required, the starter switch may be turned to position ‘II’, to operate the brake lights and direction indicators.

10. Release the parking brake before towing the vehicle.