@boatinghero If you are in Sydney, and have a weekend free, I wouldn't mind tackling the removal of the front passenger seat, as it will give me an idea on how to do it when I do mine.
Not sure if you saw this but... Not good. Is there any way you can dispute the transaction?
When I was looking at the Aurions, the dealer said it was a USB update. have you tried inserting the disk into a PC and see if there is any readme.txt?
I also want to change the head unit, but i'm concerned about the inbuilt vehicle functionality linked to the existing head unit. Also have a 2012 Presara with out of date maps.