Yep, not hard at all. You'll need to make the necessary modification in the camera to get it to work with the newly loaded cartridge (loaded with 35mm). The sprocket holes in the 35mm film with catch the shutter cocking tooth that protrudes into the film gate and it will lock the film advance lever preventing further movement and proper film advance. Disassembling the camera and separating the shutter plate from the camera body (just a few screws hold it in place) will allow you to remove the arm attached the the tooth (it pretty much just comes right out once the plate with the shutter is temporarily detached). Once that arm is removed the shutter will cock when the film advance lever is fully engaged one time and you will be able to advance the lever as many times as necessary to achieve proper film advance without the lever locking.