hello Videotraack did you listen to my sample link? the stop must occur in the third division of the second triplet.
Yes, I listened and I read what you wanted, and that's why I wrote: "Because BiaB only allows 4 beat resolution..."
Good luck, but it's my belief that the current version of BiaB (and probably all future versions too) won't do what you want. Others more skilled than I might know more.
You could write your own MIDI?