Excellent Daniel, that rocks, really blows away the workaround I did in Bridge.
But what about this:
I have a thousand images that are copied to a different folder, and these may have different keywords that I need to check, but LR does not want to import them as they are already in library.
How do I tell LR to import these so I can look at this version of them in this specific folder, but not pollute the library with lots of duplicates?