Here a link to a tutorial Shelleyrae did for torn paper in DIP
http://www.scrapbook-bytes.com/index..._articleid=101
I know that there are tons of ways to do the same thing in PSE. So I'd bet that there are several other ways to do this is DIP. If this tutorial doesn't give you the results you want, try adapting tutorials for other programs to DIP.
HTH!