yeah, thats what I heard.... there is kazaa mac that I found but it's not free. I asked around for a free version and got recomended to LimeWire.
Ummm... sorry to sound like I have computer skils of a 78 year old... BUUUT what do you mean by a new window when I'm downloading something? when I'm downloading something it shows the progress (20%, 50%, 90%, etc) and th searching all on the same window, like in this diagram:
http://www.limewire.com/english/content/home.shtml