Thanks for all the suggestions. Living in a small town I couldnt get very much, but.... what I have ended up doing is buying 4 packs of 4M long 25mm wide ribbon from tesco, the kind with fine wire in the edges and stringing 1 bit across between my wall lights and the other 2 bits hanging down my long velvet curtains. I then papercliped the cards to the ribbon. Looks pretty good too.