Quote Originally Posted by BBeast View Post
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Also, it seemed like your instructions were to merely ADD Mexico (about 250 MB) to the unit, which would leave the USA maps outdated to 2008. Not the the worst thing ever, considering how much time I have invested already trying to make this work.
I can sense you're very frustrated and annoyed at your wasted time and effort. It's hard when we put so much into something only to find that it's all for nothing. I have to point out however that not at all did i even vaguely suggest the above about merely adding MX to your current Garmin 2008. In fact, I think you're maybe confusing something I may have written with your own stated inclination to use East US & all MX, also from OSM not Garmin:
Quote Originally Posted by BBeast View Post
......... I am inclined to use OSM to update USA Eastern states in my route and add full Mexico (the img file seems to be only 250 mb, from the OSM website).

Would you be able to just list the steps necessary, including which software, needed for me to update OSM Eastern States + Mexico on my 2720? ............
As you requested I then gave you a "blow-by-blow" to obtain US & MX from OSM to install on PC either fully or partially and then transfer needed tiles to your 2720 via MapInstall.

So here's the bottom line: Unless you can obtain an unlocked and recent Garmin .gmap folder to install to PC you should use OSM. There's little difference in everyday use between OSM and Garmin mapping as i said previously. In fact the latest OSM will be far more up-to-date than the (useless for your SP anyway) Garmin CN 2017.10 gmapsupp.img you've now got which is actually from Q1 2016. The current CN is named 2019.3 for this Q3 2018 because of Garmin's rather quaint and maybe deceptive naming system.

As said by the other member, it's all spelled out how to do this. Both Garmin and OSM PC installs are covered in previous posts, #92 and #97 respectively with additional info in #100. If you need more help on any technicality we can assist for sure, the only thing we cannot help you with is the sourcing and/or unlocking of Garmin map data.