Hi,
I recommend to read my post in scn (see above) on dump & load. This provides a basic understanding of the topic.
It is also possible to store the dump configuration. This is described in the following note:
http://service.sap.com/sap/support/notes/1588316
There it is also mentioned that you can configure automatic dumps with dba cockpit.
If you don't / do not want to use dba cockpit you can use the ASE JobScheduler or operating-system scheduling mechanisms.
Best regards,
Juergen