Linux Installation

hi, first of all i don't know anything about linux . we had a administrator for all our linux requirements, now that the company has fired him (without hiring anyone for the job) i am left on my own . i want to use vpopmail extension. but the problem is it is not installed on the linux server. i want to know what is the command (exact command) that i use to install & configure vpopmail . without disturbing the existing system here what i get from phpinfo() './configure' '--prefix=/usr/local/psa/apache' --with-apxs=/usr/local/psa/apache/bin/apxs' '--with-regex=php' --with-config-file-path=/usr/local/psa/apache/conf' '--enable-sockets' --enable-track-vars' '--with-mysql=/usr/local/psa/mysql' '--with-gettext' --with-zlib' '--with-xml' '--disable-debug' '--enable-pear' --with-imap=/home/soft/psa_compiled/imap-2002b' '--enable-ftp' '--with-zend' '--with-mssql' will be thankful Haseeb