Move files to itunes
 

I'm new. I download a file and it shows in the Lime Wire library. The ITUNES folder also shows on the left side of the library. I can't seem to transfer the song into the itunes file. If I look at the itunes folders , they show the song, but not in say the Elton John folder. Hope somebody will help- this looks like a great products.
I'm a mac os 10 user. Thanks