/etc/cron.d/cron.daily ... Strange!! Is really there any directory named cron.daily? I know cron.deny, but not cron.daily.
Anyway, you can use crontab and add as many as jobs in it.
To edit crontab, use:
And to check your scheduled jobs in crontab:
Make entries in following format:
Minute Hour Day_of_month Month Day_of_week Command