I have turned everyone to my side except Kreia. Apprently she stays neutral. Is this true?

Are you ds or lightside?

I don't know what happens at the end (three planets down), but I am glowing like a christmas tree (LS master), and have managed to budge her slightly towards the light-side. I have maybe 5-6 points of influence (if each "influence gained" message equates to one point).

 

The only thing I can't get her to open up on yet is whether she knew revan. I expect that will come soon, with a few more points.

how did you do it with mandalore? I cant influence him one way otr the other (gain or lose)

I haven't been able to influence Mandalore at all.