untar, cd to untared directory and run "make install" to install
in "/usr". To install in other location run
"make DESTDIR=/path/to/some/dir install".

If you dont want to "install" it you can just run "metromap.py"
from untared directory.

To install additional data files - create directory with name
like "Moscow" in DESTDIR/share/metromap/data/ and put there Metro.ini
and picture specified in that Metro.ini or just put CityName.zip or
CityName.pmz to DESTDIR/share/metromap/data/ or to ~/.metromap/

Yes, i know that i dont know english.