$ tar xfz SomeSystem-1.2.3.tgz
$ cd SomeSystem-1.2.3
# may require other systems to be installed
$ less INSTALL
# set configuration for local conditions
$ configure -prefix=/place/for/system ...
$ make
$ make install
# system may require initial setup after install
$ export PATH=/place/for/system:$PATH
$ SomeSystem args  # start using it