Note that on windows systems you need to use "/" as a filesystem separator in the config files. (For example C:/temp)
Ant can be downloaded from: http://ant.apache.org/bindownload.cgi. Please set your PATH variable to include the ant/bin dir.
Please set the environment variables ANT_HOME and JAVA_HOME to point to your ant and Java installations.
You need to have the msgfmt.exe in your $PATH to be able to build the translation files. It can be downloaded from here: http://gnuwin32.sourceforge.net/packages/gettext.htm
Maybe you also need the libiconv2.dll in your gettext\bin directory, it can be downloaded here: http://gnuwin32.sourceforge.net/packages/libiconv.htm
To generate the graphs on Windows, download Graphviz here: http://www.graphviz.org/Download_windows.php and extend your PATH variable to include the graphviz/bin directory.