Limewire is not legal in any way. The program allowys users to get things otherwise paid for for free. So massive overload on copyright infringment. Only things that are free from it's source are legal to download. P.S.- only post your thread once.
The program itself is legal, the sharing of copyright material is illegal. Use PG2 to filter out the ip's of anti p2p companys and the lot to keep you safe. http://phoenixlabs.org/pg2/