I usually download only full albums, and to do so I type into google...
rapidshare.com/files "album name here" "artist name if you wish"
I have a rapidshare account so it works flawlessly, but bottom line is google can find anything you need. Limewire has been dead for years, its a shitty program that twists your computer up real bad. Its all about .rar's and .zip's now.
this has never been posted here before, if you stream anything on your computer it will show up in temp internet files if you turn off protected mode, windows 7.
go to tools, internet options then click on the security tab and unclick enable protected mode. stream any song you want, then click tools internet options browsing history settings view files and copy any file that you streamed to your desktop. and enjoy.