I have been using ImgTools (now version 188.8.131.52) for a few months and I can play on all the standalones I throw it on. I've used Nero by itself, Primo DVD and Gear with only a 75% success rate. With ImgTools and Nero 184.108.40.206 I have had spectacular playability. It creates the video_ts/audio_ts folders, does reallocation, title label, and DVD High compatibility mode. I recommend that if you try it and you like it then send the author a small donation. I did. A lot of folks forget.
(DVD Decrypter 3.14 in file mode, winxp sp1, DVR-105, Ritek 4x media and DVD2One)