Warner Home Video deserves credit for putting out some of the titles in their Cult Camp Classics Collection. Some of these movies are important for reasons other than their camp value: Zero Hour! of course was basically remade (with intentional humor added) as Airplane!; Land of the Pharaohs is Howard Hawks' only CinemaScope movie and his only attempt at an ancient-history epic (writer William Faulkner basically admitted that he and Hawks were just ripping off Red River and setting it in ancient Egypt); and Hot Rods to Hell is, well, it's a movie called Hot Rods to Hell and Dana Andrews and Jeanne Crain are in it. And it inspired a Freakazoid! episode called "Hot Rods From Heck!"
My one objection is including Caged in this collection, though I'm very glad to see it getting released -- it's never even been on VHS. But while it's an early women-in-prison movie, it's really not campy; it's a serious Warner Brothers social-problem picture, with excellent acting, and doesn't belong in a collection of movies with not-so-great acting.
Oh, well. Still a good collection, even if the commentary on Land of the Pharaohs is by Peter frickin' Bogdanovich. Here's a brief clip from Hot Rods to Hell: