I have the same question. What I find strange is that a Cyser is included in the list of available styles, but yet no apple cider i included in the list of available ingredients/extracts/misc.
Maybe Im missing the point of the question, but BeerSmith has 9 default cider styles and you can add a new style and new ingredients. In the Extract1.bsm recipe file, there is an Apple Cider recipe. If you haven't done so, add Apple Juice as a Sugar type ingredient.