I have to confess to not having the slightest idea, but if you have your movies in one particular folder, can you not create a shared folder in that folder and move what you want to share into the shared folder, and share that folder. That would be my solution, but I guess you can experiment with short cuts to see if they work. I somehow doubt it, but you can but try
BTW are you using Bearshare, or Limewire. I have answered from a Limewire perspective, ... A number of posts end up here having lost their way