how to upgrade the NAV600 to a NAV900.

[dannyd]

Hi guys (and girls if any), new on the forum and new on this mod for our radios. 

Last night updated my Navi 600 of my Astra J to the navi 900 firmware, it looks like it all worked fine.

Now i have a few doubts...

3D map shows a ugly gold bar on top, is that normal or that's the place for the sky? made the update at night, didn't check if the same bar apears on the day mode. 

About theme update, atm i'm now at v181, if i update using a v208 theme file, does that upgrade my navi to v208?
Found these 3 themes on the insignia-driver.uk forum, can i use them safelly?
Post #4.
(https://insignia-drivers.uk/forum/insign...post133398)
Any way to see what they look like without flashing on after another? Specially the exinfinity one.

Last question, just bought this (https://www.ebay.com/itm/VAUXHALL-OPEL-C...Swsvhe0Vpw) on ebay, what happens if i use the card on v181 and on v208? Will it work on both versions and will it upgrade something on the navi?

Thanks in advance for the replys guys.