Hi, I think we hit the send button at the same time lol...
Limewire itself doesnt contain the spyware and stuff its the crook people out there that include it in the files they share always be careful of file sizes and such to avoid these problems...I have used trend before but not for some time so im not sure if its still free or not, but if your AV is up to date you should be fine...
Maybe try burning the movies and then delete them to stop your shared folder doing this, it is a pain I know, Im still to go back into mine as I know it will happen again as soon as I do...
Best of luck....