I didn't have any problems downloading or uninstalling limewire 18-c. I didn't have to use the terminal. Are you guys sure you have the latest stuffit expander? The icon does not present in the dock (it is an applet icon), but I don't mind.

I'd try to redownload the installer (perhaps disable firewalls). Also, i'm using Internet explorer 5.1. Other browsers may give you problems?

Peace,
Gratis