Topic Replies rss feed

Hello guys ,

As I checked , the feed that is offered for example http://myforum.com/feed , gives us the latest topics and the users that created them.
What I would like to do , is to load feed based on latest replies . For example , I would like to load topic titles with the users and the time that they posted last in the topic.
Is it possible?
Thanks!

i really dont know but i use in my forum the Feedburner and its more interesting than the simple forum rss

see what i mean
http://feeds.feedburner.com/forumotion/mWrQ

and the rss widget
http://keeponblogging.forumotion.com/html-h43.htm