Most of the information here is for Warzone 3.1 and above.
current tutorials on this wiki listed in the sidebar to the right -->
http://developer.wz2100.net/wiki/ModdingTilesets – guide to modding tilesets
http://forums.wz2100.net/viewtopic.php?f=5&t=10845 – command line tool that automates production of 16, 32 and 64 size tiles from a source of 128 size tiles.