Some people make that mistake .. if I understand you correctly; see
http://www.gnutellaforums.com/genera...-20-times.html. You will find the LW program @ OSX -> Applications -> Limewire -> Limewire
A quick way there is using the Go menu in finder, choose Applications, then open the LW folder to access the LW program.

You can then put it into the dock or open it & choose to keep in dock.