Hello,
I looked at the search results page, and the way to do this would be to create a script that scrapes the search results and pulls apart the HTML to get the information you want, and then changes it into XML for RSS. The full job descriptions are initially hidden, but also available in the HTML.
The only disadvantage to this method is that it relies on the consistency of the HTML generated by that page. If Jobs Riverina changes their page, chances are it will break this script. The script can always be updated to reflect those changes, but you should be aware of that potential.
Do you have hosting where this script can run?
Thanks,
John