The standard install is:
download the source file (with .tar.gz extension)
copy it to /usr/local/src (or another safe location you can compile it)
unpack it using
tar zxvvf filename
enter the directory created (cd directoryname)
After you unpack it, there should be a file README describing the installation.
NOTE: You need to be root to do "make install". So before this, type su, you'll be asked about root password, enter it and then you can run "make install".