How to disable the shell cron jobs?

[raymov]

We are currently evaluating ISPConfig, but are not yet ready to go live on a production server. We stopped the services with:
/etc/rc.d/init.d/ispconfig_server stop
/etc/rc.d/init.d/ispconfig_tcpserver stop

However the scripts are still running, which is causing us the following grief:
1. mail_logs.php deleted our maillog
2. check_services.php reminds us every half an hour that httpd is not running.

According to Appendix 3 of the Admin manual, cron job scripts are located in the following directory:
/root/ispconfig/scripts/shell/

However the cron job does not appear in:
/etc/crontab or /etc/cron.daily/

Where can we terminate these "hidden cron jobs" from executing the shell scripts?

Thanks.