No. Sorry. Generally I'd advise starting your subtitles as a text script (have the video open in one window, write the script in another) or use a subtitle script generator. There are a couple such programs available, but I can't remember the titles. Suggest you Google "Encore subtitle script program" or a similar string.
Actually, i have made a quite nice script editor that also exports for Encore.
What you do is import a qt ref file (or Mpeg) and have full control over it while entering your titles.
It gives feedback about suggested reading time and gives an instant preview.
You also have a timeline where you can trim your in/outpoints if needed.