The genius at my local camera store figured out that it is relatively easy to load 12 exposure film into the discarded plastic cassettes from disposable cameras. This, then, can be used as the feeder roll into an actual Rapid cassette on the right side of the camera (such as the golden Penti half- frame camera). The disposable cassette is a little smaller than the Rapid, so I would think that if you don't have an original empty Rapid cassette for takeup, it would be well to experiment with a little padding to hold the take up cassette firmly in place. The maximum load is only 12 full frames of film, since otherwise the takeup cassette may jam up. It's probably wise to load and unload the film in the darkroom or in a changing bag. So I have half frame pics from what otherwise would have been a dead camera.