Help for install asterisk

Hi everyone i am new for asterisk. now i am try to install asterisk in centos 4.5 version. i want to configure 10 users and predictive dialing. installed d asterisk followed by scratch installation file. i am using broadband 1 mbps line and xlite sip phone. this campaign use for UK calling. Please help me for configure meetme.conf and extensions.conf and any other necessary files to configure.

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