Just say, Light Jedi can train Dark Jedi and Dark Jedi can train Light Jedi.
For example, Bao-dur gets influences the easiest thru lightsided acts. IF you play as a dark sider, those times do those things to influence Bao-Dur. With Bao-Dur, If you know what you are doing, it is make him a darksider by the first planet after Telos with three influence hits.
I do use the Haharr glitch just in case I get too many LS points when I am play as a Dark Jedi. Mira like Bao-Dur, is an LS character. So if you want her and him Dark Jedi with Positive influence, Be as much of an **** as possible while they are NOT in your group.