Well, for G0-T0 and HK-47, that's trivial, since they start out evil.Genii Lodus wrote:It is good that you can even get your droid to follow the dark path.
For T3-M4, the most you really have to do is not be a dick to either him or other astromech droids. Most of the T3 influence gains that do not involve telling him how great he is will gain you Light Side points, but there are still ways to gain influence with him neutrally.
Making HK-47 a pillar of light, however, is the real challenge. Mostly because it is easily the most counter-intuitive thing you can ever do in the game. IIRC, there is exactly one thing in the game you can do that will gain influence with HK-47 but not get you Dark Side points. One. So oftentimes gaining influence with him involves doing something stupidly evil, gaining influence with HK-47, sending him back to the Ebon Hawk (so you don't quickly lose that influence), atoning for the evil thing you did (which would make you lose influence if HK were with you), bringing him back into the party, then doing another stupidly evil thing to gain influence.