Below are webaddresses for the MX Gov't website where their official maps can be found. These are the latest and where companies like Guia Roji get their maps. They are large .pdf files that can be downloaded using Adobe Acrobat Reader. Once in you computer you can zoom in and move all around the maps. The first is a list of all the maps state by state. The second is the map of the whole country. At 100% size these maps are the size of folded road maps - about 3 feet square. But if you use them in your computer you can zoom in further and if you have one of the more recent MS PC OSs you can use the Snipping Tool to print sections of the map if you want. BUT these still will not give anywhere near the detail you get with MS Streets & Trips. I should mention that these maps seem to be more detailed than Guia Roji.
And they download for FREE!
http://www.sct.gob.mx/informacion-general/planeacion/atlas-cartograficos/listado-de-atlas/
http://www.sct.gob.mx/informacion-general/planeacion/atlas-cartograficos/mapa-nacional/
