The 'Makings ofs' on the Rowman discs are subtitle free. I can't find anything to back it up but I thought they were taken from the vhs releases. It's also worth noting that the two documentaries on the Jedi disc are at half resolution (352x480) to fit them both on a single DVD.

The other thing about them - at least the Jedi ones - are that they seem to be from a different transfer of the documentaries. I once tried using these version to cover the subtitles on the Japanese transfers, and aside from colour and contrast differences, the framing was different between the two versions, and it required a lot of warping to get the two versions to match up, which ultimately made the exercise impractical.