Path to the affected file:
IzPack/doc/izpack/html/installation-files.html#the-packs-element-packs

Here is what the current docs say:

<file> - add files or directories

The <file> tag specifies a file (a directory is a file too) to include into the pack. It takes the following attributes:

• src: the file location (relative path) - if this is a directory its content will be added recursively
• targetdir: the destination directory, could be something like $INSTALL_PATH/subdirX
• os: can optionally specify a target operating system (unix, windows, mac) - this means that the file will only be installed on its target operating system
• override: if true then if the file is already installed, it will be overwritten. Alternative values: asktrue and askfalse - ask the user what to do and supply default value for non-interactive use. Another possible values is update. It means that the new file is only installed if it's modification time is newer than the modification time of the already existing file (note that this is not a reliable mechanism for updates - you cannot detect whether a file was altered after installation this way.) By default it is set to `` update``.