if your using redhat or mandrake... and have rpm installed.. just issue this command:
rpm -i name-of-file.rpm
and it should install it for you.. if your like me and you use slackware without rpm, or don't like rpm's cause you like source files, you can issue this command
it will create a
tar xvf name-of-file.tar.gz
then it will create a directory /usr/bin/ymessenger or osmething like that... cd into that directory and type:
and it will launch yahoo messenger...