[ale] Need ideas on how to maintian /etc/crontab

[Jim]

I have a number of programs that run from /etc/crontab. These don't lend 
themselves to being run from an y of the cron.daily/cron.weekly, etc.  
Not all systems have all of the programs so I'm looking for a way to 
automate the insertion/deletion of the entries.  I know I can write a 
perl script to do it, but I was hoping there was something already 
written to do it.  The insert/delete will be driven by rpm -i or rpm -e, 
so it's gotta be a script or something callable from the %post rpm 
script set.

Anyone know of a canned solution?

Thanks,
Jim.