Ok, what you need to do is simple. Go to the website, and click on the file that starts with Limewire Pro 3.0.2ju...

It will download, and it is a disk image that will expand automatically on OS X. Then, all you have to do is drag the folder to your applications folder (of whereever) and that's it. Simple as that. And boy, if the app a beaut. It fixed a major problem for me, and decreased memory, processor use as well as a few little GUI bugs having to do with "hiding" the window. It's a great program.