Hello,
Please find attached a patch that will generate a .nsi file if --nsis is provided on the command line. This .nsi file can be use with NSIS (http://nsis.sourceforge.net) to build an EXE installer for installing the maps with MapSource on Windows.
Known limitation: for now I assume that --index and --tdbfile were present on the command line. If not the installer will probably fail because of missing files.
Please let me know your feedback.
Thanks,
N.