The deleted scenes in HD have the same ratio as the movies themselves: 2.35:1 plus black bars in a 1920x1080 frame.
However, as there is still no one offering me any assistance... :( I don't have those scenes in HD either. The scenes for Year 4 I do have by now, as I decided to buy the Ultimate Edition myself! :) A beautiful box; I'm really happy with it!
Now I can finally start with the Extended Cut of Year 4!
In the meantime, I added a second sound track to the Extended Cuts of Year 5 and 6. The first tracks were based on the original (not transcoded) Dolby Digital (AC3) track. The second tracks are based on the available HD tracks, meaning LPCM for Year 5 and Dolby TrueHD for Year 6. The upcoming Year 4 will also have two tracks: based on Dolby Digital and DTS-HD Master Audio.