I'll take a guess that you'er using LW right?
So you've created a folder you wish to share. Just drag & drop or cut & paste or copy the songs to the folder. To share it, go to LW's menu Tools>Options>Sharing & press the Add button & direct it to the folder & select it & then press Apply button. If you're not sure of its location, go to the folder & select file>properties & this will show you the path, name & location of the folder. Just follow this path. In the LW library window, you might need to press the Refresh button for this folder or its contents to show.