Andrew, Don't be afraid to play around with the settings. If you don't get the results that you were after then change them back or try something different. People are so quick to uninstall and reinstall. Give Limewire a chance to work. I see EVERYDAY that someone posts; " I have uninstalled and reinstalled 10 times and nothing changes. Well HELLO, if it didn't help the first 3 times then why keep doing it over and over.
Try the Cable/DSL setting for a few hours. If it's worse then change it back. If it's better than it goes to show it's worth the effort to try different things.