DITA2Map requires DITA DTDs, and executables dita2map.exe and libexpat.dll. If you have installed DITA2Go you already have the DTDs and these executable files.
Unless DITA2Go configuration file dita2map.ini is already present in the directory where you want DITA2Map to create a map, you might want to create a configuration file named dita2map.ini, and populate it with the options listed in §46.3 Specifying DITA2Map configuration options. However, a configuration file is optional; instead, you can accept the defaults for most configuration settings, and specify the rest on the command line. To determine processing options, DITA2Map looks first for dita2map.ini; if that file is not present, DITA2Map uses default settings.
To use DITA2Map, you must have at least the demonstration version of DITA2Go installed on your system.