(.*)_(.*)_(.*)-(.*) Now, you know g1smd is not going to let you get away with that.
Remember that mod_rewrite and htaccess and Apache and all computers everywhere are very stupid. They can only think in one dimension. They can't say "I must leave room for a lowline and other stuff and another lowline and more stuff and a hyphen and..." It is all "Oh, oops, I gobbled up the whole thing and now I must spit it out and find a lowline." Unless you tell it not to be so greedy in the first place.
So what you need is probably something like
Never .* except maybe at the very end. Otherwise you could have an URL like