Wordpress Cron job

I want to disable Wordpress Cron, and setup a system cron that will call wp-cron.php every 5 min, so I have

Code:

*/5 * * * * sleep 192s ; wget -O - -q -t 1 http://mysite.com/wp-cron.php?doing_wp_cron > /dev/null 2>&1

I noticed the entry for wp-cron.php has sleep 192s, what is the purpose of this? Can I remove it?

Thanks

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Another neat feature of CMM, thank you.

 

This will come in handy when I move all the small Wordpress sites together