To set the script to run from a cron job you need to add a line to your crontab file like this.

0 7 * * * /share/podcasts/bashpodder/bashpodder.shell

You may need to change the path to the script if you didn't take my suggestions about where to store your podcasts in the previous sections. The best way to edit your crontab file is by running the command

crontab -e

because after editing the file, it'll run the necessary commands to update the running crontab daemon for you. If you have problems, or you are not familiar with cron, see the cron man pages with

man cron