Is there an external USB 3.0 drive that supports DVD+R book typing to DVD-ROM and also supports Blu-Ray burning (preferably also m-disc compatible)?
If not an external, perhaps an internal drive that I can put in an external enclosure?
Maybe LG's BE14NU40 will work for you. The internal variants at least tend to properly booktype +R and +R DL to -ROM when burning with ImgBurn
Thanks! That's the one I've been looking at but wasn't sure if Imgburn could booktype it.
If, for whatever reason, the drive still ignores the booktype command from ImgBurn, it may be flashed to ASUS firmware and should automatically booktype. Or you could flash to the firmware for the internal drive.
Associated thread: http://club.myce.com/f87/asus-bw-12b1st-rebadged-lg-bh14ns40-version-not-liteon-ihbs112-version-335096/index3.html