I saw somebody post an identical question not so long ago. I don't know the answer, but if you search for - magnet* on the forum you will find your answer.

I did a quick search & you can check these:
1. Magnet Link Handler

2. http://www.gnutellaforums.com/search...der=descending

3. OR send a pm to Stief here (quite knowledgable about magnetlinks): http://www.gnutellaforums.com/member...threadid=34828