Assigning file names and avoiding duplicates

[David Liontooth]

I'm using rssdler to download news feeds from CNN, for instance http://rss.cnn.com/rss/money_latest.rss

The problem is that all the files are called index.html. Can I use rssdler to give them a sensible name -- ideally, derived from the date and the text in the link?

Also, how do I tell rssdler not to download files that have already been downloaded in a previous session?

Thanks!

David