I got hold of the 720p mkv version of the Renegade Grindhouse in the end (from usenet). It doesn’t seem to have any glitches towards the end after all, which the original 1080p mkv file suffered from.
However, I can’t get it to fit on a dual layer DVD disc despite this version having “DVD9” in the filename. I know that it won’t fit if converted to AVCHD format (which needs more room than just a raw mkv file), but I am simply trying to burn the raw mkv and it already seems too big. The mkv file I have is 8,724,585,522 bytes and ImgBurn tells me the capacity of my Verbatim DVD+R DL discs is only 8,547,991,552 bytes. I believe a number of posters in this thread have succeeded; what’s the trick?!