I guess that this is NOT what you wanted to know, however it would be irresponsible of anyone to advise another on how to break the law:
PART 18—MISCELLANEOUS ROAD RULES
Division 1—Miscellaneous rules for drivers
299. Television receivers and visual display units in motor vehicles
(1) A driver must not drive a motor vehicle that has a television receiver or visual
display unit in or on the vehicle operating while the vehicle is moving, or is
stationary but not parked, if any part of the image on the screen—
(a) is visible to the driver from the normal driving position; or
(b) is likely to distract another driver.
Penalty: 2 penalty units.
Note Motor vehicle is defined in the Road Safety Act 1986, park is defined in the
dictionary, and vehicle is defined in rule 15.
(2) This rule does not apply to the driver if—
(a) the driver is driving a bus and the visual display unit is, or displays, a
destination sign or other bus sign; or
(b) the visual display unit is, or is part of, a driver’s aid; or
Victoria Government Gazette P 2 28 October 1999 221
(c) the Corporation has, by notice in writing, exempted the driver from
subrule (1).
Examples of driver’s aids
1. Closed-circuit television security cameras.
2. Dispatch systems.
3. Navigational or intelligent highway and vehicle system equipment.
4. Rearview screens.
5. Ticket-issuing machines.
6. Vehicle monitoring devices.
Note Bus is defined in the Road Safety Act 1986.
AUSTRALIAN DESIGN RULES
42.16. TELEVISION AND VISUAL DISPLAY UNITS
42.16.1. General
All television receivers or visual display units and their associated equipment must be securely mounted in a position which:
42.16.1.1. does not obscure the driver’s vision;
42.16.1.2. does not impede driver or passenger movement in the vehicle; and
42.16.1.3. is unlikely to increase the risk of occupant injury.
42.16.2. Restriction on Visibility of Screen
Unless a driver’s aid, all television receivers or visual display units must be installed so that no part of the image on the screen is visible to the driver from the normal driving position.
Any (ANY) modification(s), unless approved to ADR standards, that change/alter/modify any aspect of your vehicle from the ADR standards/requirements that existed at the time of manufacture of your vehicle are ILLEGAL.