Ok, the map you've downloaded is about 18 months out of date as we're now on 965 series and 970 will be released in the near future.
However, being as you've already got it, you can install that map for now to get it up and running and then download a newer map when you see fit.
So that map will be contained within it's own folder...copy it to the device
Then download
FastActivate and extract it to the device
Run FastActivate.exe on the device and select options 2 then 3
Disconnect it from the PC and reboot it...job done