@yab_tater
unfortunately no progress so far on text outline color in DVD Menu. But do not give up hope...
About chapters position when source is NTSC-film based (23.976 fps), you have to consider that the output will be at 29.97 fps (2:3 pulldown), hence the output frames "seen" by Muxman will be more than the source frames. This effect is considered in AVStoDVD. If you want a chapter flag at 10:00 minutes, put 18000 fps and you will have it in the output DVD. I suggest you to use the 'Preview Clip' option, you will have the possibility to easily insert the chapters flags using a proper button in a visual context. AVStoDVD will take care to do all the timestamps-to-frames conversions.
I may agree with you that switching from frames to timestamps in the manual insert routine would be less confusing. Another item in the ToDo list.
Bye