Help needed, Opera scene in 50Hz

Yeah that works most of the time.
Thing is that I just don't know when the player makes his/he choice in the beginning, originally the music loops and holds the script until a certain point in the music until letting the script continue, because of the 50hz patch it doesn't wait and the sync is waaaay off.

Edit: Basically, I can sync the choice window, but if the player makes the choice in 2sec instead of waiting for it to disappear the sync is bust.