there should have had instructions along with the download, I dont remember exactly how to load them, but I did also put them on my SD card and have had no trouble using them.
They work on my 550 and are routeable not sure about yours but worth a try as they are free, When I downloaded them, I do so by state to keep the files smaller, so far on a 4G Card I have most of the Midwest and a few others with plenty of space left.
Will be showing up some time on Friday, we are camping in Waupaca, as all the electric sites were gone at Hartmann, but will only be a few miles away, might even come down on Thursday night depending on how I feel after work.
We will be staying closer to home or attending events where we can make a weekend in the area. good thing we have the camper, and dont mind stayin in a Walmart parking lot.
