It's a little difficult to create the magnet links without a wizard, - and at the moment it's problamatic to use magnet links, too (because LimeWire doesn't send urn queries anymore). Creating magnet links only makes sense if you have a static IP and if you can function as an alt-loc server.
magnet-uris look like this:
magnet:?xt=(URN of the file)&dn=(url encoded name of file)&xs=(URL of file)
magnet:?xt=urn:sha1:3TJGP3DANDWHATNOT&dn=Somesong. mp3&xs=http://myhostnameorip.dyndns.org:6346/uri-res/N2R?urn:sha1:3TJGP3DANDWHATNOT