So let's say you have a very nice downloads folder, full of stuff. By running a bittorrent lib process side-by-side (using libtorrent) you could create torrents for each of the files and publish this metadata in the comments associated to that file in the Kad. I mean, the comments now used only for valuation like "file good", "not so good" etc.
If every aMule client does that, we could decorate with the torrent metadata all the files in the Kad and allow users (or possibly even automatically future clients) to download by other (torrent) means and in the end increase reach, swarm/kademlia net size and ultimately allow for faster downloads.
The gui for the user could simply have a "copy torrent magnet" button in the metadata comment with the hash, and that would be basically it.