how to upgrade the NAV600 to a NAV900.

[ultimatelightweight]

....CDR..DISC...FORMAT....

OPEN THE, NAVI 600 900 RUS FIX.RAR., FILES AND BURN THE DNL ISO FILES IMAGE TO A CD-R or CD-RW DISC not a DVD Disc
USE A GOOD QUALITY DISC LIKE VERBATIM CDR 52X 700MB OR WHATEVER YOUR ARE USE TO
AND COPY THE FIRMWARE IMAGE OF THE ZIP FILE DNL TO THE CDR DISC
USING A BURNER SET IT AT AS LOW A SPEED AS POSSIBLE X1 IS GOOD BUT UNDER X4 SEEMS FINE
THIS WILL HELP TO BURN THE DNL FILE Image AS IT WILL NOW COPY BETTER TO THE CDR AND UPLOAD CORRECTLY TO THE NAVI.
ALSO WINDOWS 7 BURNER WORKS WELL ON A LOW SPEED
BUT WITH THIS WINDOWS 10 NOT SO GOOD
OLDER WINDOWS WORKS BETTER FOR THIS OR USE WINZIP AND ANOTHER BURNER PROGRAM FOR WINDOWS 10
BURNER LINKS LOWER DOWN THE THREAD.

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Hi Guys,

Looking into doing this, and getting stuck before I start!
I've downloaded the NAVI 600 900 RUS FIX.RAR but my Win10 machine doesn't allow me to follow the instructions.
It's downloaded as a RAR file, but when I try and open the file, it opens as a Text file.

Any ideas?