JasonLee wrote:d) The patch must be applied while the GPS is in the Pre-boot Mode or in the Diagnostic Mode. There are 2 ways to enter the Pre-boot Mode:
i. Move the power switch of your unit to ON and hold it for more than 30 seconds in the ON position. You are in the pre-boot mode when you see the LOADER message. Keep holding the switch to ON and connect your USB cable. Wait for 3-5 seconds or longer for your PC to recognise your unit. After the drivers are loaded (your PC will beep), run the updater.exe file and release the power switch only when you see data being transferred from your PC to your unit. Wait for the LOADING or flashing to complete uninterrupted.
ii. If you get a calibration screen inviting you to press the dot when you held the power switch for more than 30 seconds then you have to use this alternative method. Hold the switch to ON for only 5 seconds then connect the USB cable, wait for 3-5 seconds or longer for your PC to recognise your unit. After the drivers are loaded (your PC will beep), run the updater.exe and release the power switch only when you see data being transferred to your unit. Wait for the LOADING or flashing to complete uninterrupted. If the calibration screen comes on before you can run the updater.exe, it means you have held the switch to ON for too long (more than 30 seconds). Switch off the unit and start over.
e) If the above 2 methods do not work for you, switch on normally and then touch the battery icon for 10 seconds for the unit to get into the Diagnostic Mode. (Incidentally, you can charge your battery with your PC using a USB cable if you plug the USB cable in when the unit is in the Diagnostic Mode.) Then connect the USB cable, wait for 3-5 seconds or longer for your PC to recognise your unit. Run the updater.exe. Wait for the LOADING or flashing to complete uninterrupted.
Wau wee..........
I have successfully flashed the patch. 
But initially I couldn't flash using the above three methods. Success using the forth method below;
1. Hold your finger and keep pressing on nuvi's screen.
2. Move power switch "ON" and quickly move to opposite "LOCK" position.
3. Connect USB cable.
4. Wait for 3-5 seconds or longer for your PC to recognise your unit.
5. Run the updater.exe (Remember to rename 075401000460en_tracklog_fast_menu.rgn to 075401000460.rgn before use with updater.exe).
6. Wait for the word "LOADING" appears or flashing, release your finger from Nuvi's screen and wait until the patch uploads to complete uninterrupted.
The above method is proven working in my Nuvi 760.
Will try the tracking tomorrow and feedback again.
bro JasonLee 
bro JasonLee, need help pls..... 
Pls refer to the picture attached.
