Write an Automator script that talks to iCal & crontab (Mac)

I’m looking for someone to make a simple script for me.

I would like the script to take events from selectable iCal calendars, translate the time/duration of the events to run cron, which will in turn run a program called Self-control at the designated times.

The program is here: https://github.com/slambert/selfcontrol/

The post that inspired this (with some helpful info): http://hints.macworld.com/article.php?story=20100801214648362