In µTorrent it is possible to change the location and name for each file in a torrent under the "files" tab in the torrent's details.
So you can make two torrents use the same file, even if differently named originally under the condition the content is to the bit identical.
However, that works for seeding at same time, but not for downloading at same time. So you can only download from one torrent at a time. Writing to the same file from two torrent's downloading at the time will create error messages (style can't access file).
