Given what we think we know about how memory works, we're probably much closer to editing out bad memories than we are to copying memories across bodies.

I say that because there does not seem to be a non-interactive way to recall memories. Every time a person experiences a memory (remembers), they also alter that memory. Researchers have been able to fairly easily alter or implant memories simply by suggesting the changes to subjects while they are in the process of remembering.

It sort of makes sense--the moment of remembering is itself a memorable moment, and so the brain updates or replaces the original memory with what was recalled the most recent time. If the recall was messy, the old memory will now be messy too.