How to make an exact MIDI replica:
Highlight the MIDI and ctrl+c. Click away and ctrl+v.
Also, a good MIDI editor would be Anvil Studio
. It's definitely not the best, but it's free and it's what I use.
There's no way to create a perfect MIDI version of a track from, say, Metroid Prime, but with a musical ear, practice, and time, you can get them about as close as MIDI can get. Of course, we ended up going for remixing all the tracks anyway, so accuracy isn't that important. :P