Creating .torrent for ISO sharing

1. Open Transmission (please don't use another bittorrent client because it may behave different)
2. Click on "Torrent -> New"
3. Add the ISO file and use as tracker urls (don't check "private torrent"; activate DHT & PEX if possible --- You can get a list of active open trackers at: http://www.trackon.org. Insert a blank line between each tracker you add):
   • http://tracker.publicbt.com:80/announce
   • http://byteshower.appspot.com/announce
   • http://exodus.desync.com/announce
4. Upload the torrent file and add it to your bittorrent client of choice. Point the download location to the ISO file, that is already on your hard drive. Transmission will automatically detect the existing file and start seeding.