First things first: I read the FAQs, I am using Stuffit Expander, I have the latest Mac OSX installed

When I try to install Limewire Pro the installer starts, lets me select the language, shows the introduction page and then asks for the location. Regardless of which location I choose I always get an error message stating that I do not have the necessary permissions. Even for my Applications folder.

If that helps: The only strange thing I found is that the installer does not show a file size in the Finder window (in the Info window it shows the size though).