This application was created primarilly as map viewer but later with added functions for reading comix in bitmaps. Application uses proprietary file format: bitmaps divided into box regions for faster reading and drawing. Files can be on cards only - internal RAM is not supported. Internal "card" (e.g. in T5) is supported as it behaves like standard card. Files for MapView can be created using PNGtile utility: it converts PNG files or PNG tiles (matrix of PNG files) into one file for MapView. If you need to do your own map you can cut&past bitmaps from map's websites into graphic editor, then use PNGtile to create map file.
MapView with PNGtile can be downloaded here.