Publisher extension

Launch ArcMap and open a project.

Enable this extension in ArcMap then turn on the toolbar for it.

When you "publish" a map, it will create a file with the extension .pmf which is associated with ArcReader.

Given that this could be a dandy way to distribute a map with software and all that, is the ArcReader file format proprietary?

It's BINARY, that's for sure. What, you were expecting ArcXML?

Figures.

Arc Publisher is not a very advanced application, if you can reverse engineer the PMF format, happy days.