Why are you so interested in ripping these American broadcasts of Star Wars? The German HD broadcasts are of much higher quality (higher bitrate and MPEG-4 encoding) and being satellite broadcasts, they can easily be recorded on the computer (DVB-S PCI tuners). Also, slowing down the 25fps broadcast by 4% is much less error-prone than IVTCing the 30fps interlaced broadcast (the IVTC pattern may change). You can get high-quality audio from the Laserdisc or DVD releases. Although you'll need to replace the Krieg der Sterne texts :/

edit: I imagine there are hacks for cable boxes similar to region-free hacks for dvd players to disable 5c restrictions.