This is because trackbacks are hardly used anymore for legit purposes and most of them contain spam.
Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.
Top 4 Download periodically updates information of Disable Trackbacks 1.0.0 script from the developer, but some information may be slightly out-of-date.
Our script download links are directly from our mirrors or publisher's website. Disable Trackbacks 1.0.0 torrent files or shared files from free file sharing and free upload services, including Rapidshare, MegaUpload, YouSendIt, MailBigFile, DropSend, HellShare, HotFile, FileServe, MediaMax, zUpload, MyOtherDrive, SendSpace, DepositFiles, Letitbit, LeapFile, DivShare or MediaFire, are not allowed!