Can you be a sith on knight of the old republic instead of training as a jedi

In KotOR 1 you must be trained by the Jedi Council on Dantooine, and the class you choose is always a form of Jedi, even if you turn to the Dark Side. In KotOR 2, when you choose a prestige class, the names of the available classes are dictated by your alignment throughout the game (Sith for Dark Side, Jedi for Light Side).