Maps are ex-military topographic 1:1,000,000 covering Mexico, Central America & South America in 3 pieces, about 600mb. After paying for the maps at the shopping cart (choose $0 for the shipping option) - maps will be sent to you by "Send it ftp" within one day, you just have to click on the link to start the download. You will have 7 days to download the maps from the link which will come to you by email. The encryption key text allowing you to unlock the maps in Memory-Map will also be sent to you by email. These maps will work in Memory-Map on Windows, Apple ipad, iphone, ipod touch, Hema PND or Memory-Map 2800 gps. Memory-Map can only be purchased from itunes if using them on an Apple ipad or iphone. Purchasing Memory-Map seperately for windows is $19.95 & can be bought online just below, this will be sent to you the same way. Memory-Map is a stand-alone program that has been around for about 15yrs. It has been the leading moving-map software since it's introduction.