If you've deleted it from your computer, simply re-import the files from your DVD back onto your harddrive. If all the DVD-Rom stuff is still there, it should work fine. Make a folder called "ISOMIX - Jedi", then make another folder inside that also called "ISOMIX - Jedi". Then drag the files from the DVD-R into the second folder.
Then go to MySpleen, download the torrent file select the first directory as the download folder. It should recognize the file structure as the same and begin seeding.
Was that confusing at all?