Leaving to Australia tomorrow! RV 760LTM, need some help =/

Hey all!

So I have this installed on my mac's desktop: https://isohunt.to/torrent_details/13328531/Garmin-City-Navigator-Australia-And-New-Zealand-NT-2015-40-UNLOCKED

Its the 2015.40 for australia new zealand NT.

I own the RV 760LMT and we are leaving in a day. I am having trouble installing the above link to the device. I dont see the supp.img file anywhere, and tutorials are bland to my unit version.

Think anyone can help me out, I want to make this trip with my pops special, rented a motorhome and I am not too good with this sort of thing.

I just dont ever see any files and how to install them exactly. I create the Garmin folder on the sd in ms-dos (fat32) format, and place the gmapprom.img in there, change the name to gmapsupp.img but nada.

Thanks!!