My what a large number of pascals we have here in the forum.
You will want to file an enhancement request in the issue tracker (please do this first)
I think it is possible to create this now fairly simply by doing the following.
Then if you need this feature now. You may wish to create a custom cronjob (ie: cronjob/bcdatedrssimport.php) and php class (ie: kernel/classes/bcdatedrssimport.php) to augment the existing base php class and cronjob with these to provide this custom functionality.
