How to automatically schedule a crystal report

I have to schedule the report on every 18th till next month's 18th.. say i'll schedule a report on 18th sept 2012 to 18th oct 2012. and then again on 18th oct i'll schedule it from 18th oct to 18th nvmber. So the problem is every i have to do it manually..and for a single report there are 14 templates.

Is there a way ..where instead of schedulling it manually every month. it gets scheduled automatically on 18th by taking the current month value from my system's date. ?

Because evrytime the users are the same.. so its just the date that needs to be changed.