[expert] Cron

[Jim]

Greetings,
        According to the couple of Linux books I have cron is supposed to store
the users crontab file in /usr/spool/cron/crontab. There is no default
directory by that name included with M6.0. Can I create that directory and have
it work fine or is there something else I nedd to do? 
        Also the book once again says to store the users allowed to use cron
in  /etc/cron.d/users. Can I create this or does it go somewhere else. Perhaps
using linuconf? 
Cheers 
Jim