1. The main item is just trash the LW program folder.
If you wish to remove every single item then see below:
2. LW preferences found here: /Users/your_username/Library/Preferences/LimeWire
3. Double-click the harddrive icon, open the Library, open the Receipts folder, then find the file: Install LimeWire.pkg, delete it.
4. Delete your LW downld & incomplete folders wherever you decided to locate them. Use Find if you're not sure. These will both be in the same parent folder.