Will you help with a Star Wars Blu-Ray release question?

Been surfing the net for information on whether Star Wars episodes 4, 5 and 6, the theatrical, unmodified and uncorrupted version were really released in Blu-Ray. It seems it was and got released in 2008?

I almost bought a trilogy package but reviewers said those were the ones that Lucas modified. For example, they changed the musical score in Return of the Jedi’s final scene and inserted Christian’s, who played Anakin Skywalker, ghost in that end scene as well.

Have you actually seen or better yet, own one of these supposed unmodified episodes in Blu-Ray? Thanks!