you can still make light side decisions while playing for the empire. Most of the dark side decision have a purpose, such as more money. You can explain that some people value material things or laziness over a sense of right.

When you get a ship it has a droid on it. It can equip them, but other than that i don't know.

Is there any point in taking along your ship droid as a companion? What can he equip, and is it worth buying/crafting equipment for him? He's not listed in the codex so I'm not sure what he likes or dislikes. There is not a lot of info on him on the boards so I thought I would ask around.