Hi Ben
Are you looking for routable maps of the black stuff /tarmac or the green stuff / eg BOATS for trail riding?
I believe the link you point to is for the black stuff for navigating around Europe on tarmac.
I personally have found City Navigator Europe
https://buy.garmin.com/en-GB/GB/p/6299/pn/010-D0036-00worse than useless in the Montana and prefer Google maps / TomTom or the Zumo
I would be interested to hear of someone who has the routing working well on a montana
If you are looking for the green stuff this is the wrong map and you need something off here
http://www.garmin.com/en-GB/maps/outdoorI know this is confusing so happy to help with a quick call and save endless posts - plus give you a few (genuine) maps on sd card to try out before you buy.
You can call me on 07721480000
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