Greetings bingogirl,

Welcome to the Gnutella forums!

By default, portions of files that you are downloading (your Incomplete folder) are being shared with other users. Completed downloads are also shared by default. You can see which directories (folders) are being shared by Limewire (I think it's under the options tab). You're probably sharing only those two folders.

Anything sent out over the Internet cannot be gotten back. Even e-mails leave copies on servers, etc. Once it's out there, it's virtually there to stay.