Please could someone explain to me in idiot-language how to organise the files I share with Limewire?

At the moment, if I click on Library, I seem to be sharing my desktop. The folder is called 'Saved Files' but it actually lists most (but not all) of the files on my desktop.

If I delete things, they are actually deleted from my PC.

'Stop sharing' is greyed out.

I cannot find a shared folder within my Limewire folder.

How do I stop my desktop from being shared, and keep a control on what files and folders are accessible by others?

I use Windows XP Home.

Eternally grateful if you can help.

Thanks.

Hazel