rpm -Uvh [link|http://www.mirror.ac.uk/sites/ftp.redhat.com/pub/redhat/redhat-7.2-en/os/i386/RedHat/RPMS/ntp-4.1.0-4.i386.rpm|http://www.mirror.a...0-4.i386.rpm]
and you better pray you got the [link|http://www.mirror.ac.uk/sites/ftp.redhat.com/pub/redhat/redhat-7.2-en/os/i386/RedHat/RPMS/ntp-4.1.0-4.i386.rpm%5Bpeek%5D|deps] installed :)
(BTW, the UK Mirror Service absolutely rocks and it's quick, even for you colonials)
I've got ntpdate hooked up on an hourly cron job. Simpler than futzing around with a full ntp server.