The only way I can think of to do this would to be to use a program like phoenix twitter desktop or some other tweet scheduler, load the txt file as your scheduled tweets and then make an rss of your tweets.
It would be like the shortest micro rss things ever though.
You could also make a quick blogger page, copy and paste each item in the feed as a separate blog entry and set them up on scheduled posting times under the posting options, then just create the rss of the blog.
I'm sure much smarter people will chime in after me thankfully. just threw a few out there.