You stated you've searched but this question is easily answered by searching this: remove grub restore mbr - Google Search (other combination of words may work either). When we ask people to search, it's not only in the forums. Google is a powerful tool and may answer almost any question you have.
Yes, there are various tools in BT4 for that. You can use synaptics package manager, aptitude, "Add/remove... package manager" (I'm not sure if this is the right name, since I'm not under BT4 right now), etc...



