Amend web scrape

We have a scrape that we created for a website. This scrapes the flights when called, and returns results in XML format. The scrape works [login to view URL], we would like to make 1 amendment, and 2 additions to this scrape: - 1) We would like to change feed to scrape from a mirror site on a different URL 2) We would like to add 2 additional parameters to the scrape.