I have a quick non-speaker question. We just bought my in-laws a new DVD player. They have a TV/VCR combo that has a composite input, but direct connection to the player results in that irritating Macrovision effect. While that generally means I need to pick up an RF modulator, they use an old Dolby Surround receiver that will video-switch. Can I get away with simple video-switching to get around the Macrovision effect, or will I need the modulator regardless?