53890 setting up e*reminder

I downloaded [login to view URL] and want to incorporate it into my admin panel i've been creating. So first i need someone to configure it correctly as i cannot get it working. I actually think my error is in setting up a cron job (i have no idead how to do this correctly) After that i just need help setting up the link the correct way in my admin panel which i can show later. That's it. Thanks.