Thanks for all your replies guys Have taken all advice and info on board....

Still not getting the *missing* shared files thing though

If I keep Limewire *open*, i.e. set my upload/download bandwidths to zero and don't allow *any* upload slots and don't download anything - overnight for example.... so the next morning I don't have to load everything again.... I find that the amount of files I'm sharing has decreased.
Could be anything from 50-80 files that have *unshared* themselves....
They're all still *in* my *Shared* folder.... but I have to go into it, right click them and *share* them again....