This mod started out as a part of a larger modification which involved giving the Exile more choice in a few key places in the game. I never actually finished with this, however, and up to very recently, haven't been in the mood to do any modding work.
This is for all of you out there who have ever wanted to play as a Darkside Jedi Master, or a Lightside Sith Lord without having to switch alignments halfway through the game.
What this does: At level 15, you will now be able to multiclass to a specific Presgtige class, regardless of alignment. (Ie, if you are lightside you can choose either a sith or a jedi prestige class to level into)
Furthermore, this will solve the problem of Grey Jedi not receiving a Prestige class, as the alignment check the game makes goes from 51 and higher (Ls) to 50 and below (Ds).
In order to choose a class of the opposite alignment, click the "I wish to learn the ways of the (Higher Jedi/Sith), instead" option, and Kreia will list the three classes attributed to the opposite alignment.
Fred Tetra for the amazing Kotor Tool
Tk102 for the wonderful Dialogue editor he created
And the rest of Lucasforums, for their wonderful tutorials, and support