The IP addresses in that first post should be blocked, not allowed. They're bad IPs.

Make sure LW's closed before you delete the preferences folder
When you're looking for the preferences folder, first of all go start > my computer > C drive > Documents and Settings > your name. See if there's a folder called .limewire...if it's there, delete it.

Now go back to Documents and Settings. At the top of the page click on tools > folder options > view. Put a dot in the button to show hidden files & folders > apply > ok. Now back to Documents & Settings > your name > Application Data. Look for a folder called LimeWire...if it's there, delete it. You have to have at least one of these folders, either the one within Application Data or the .limewire folder. You might have both, depending if you've used older versions of LW before.

Now start LW, go back through your LW tools > options & reset all your options to the way you like them. When you've finished that, LW should've had time to settle & so try a search