Custom Search Images

We want the search word to following word "images" before clicking on search button. Site address: [login to view URL] Examples: the user types "superman" we want the search to be "superman images" "flags" we want the search to be "flags images" "car" we want the search to be "car images" We want the word "images" at the end of searched keyword or key words. We are using "Google Custom Search"