I'll tell you how to do it, step by step so you'll know for the next time you want to download another.

1. Once you have your .zipped skin, click on the Themes folder in the .limwire folder and create a new folder. If the skin you downloaded is called Christmas(this is just an example), then name the folder Christmas_theme.

2. Unzip the skin and make a copy of all of the .gifs, .txt, etc. and paste them in the Christmas_theme folder.

3. Click on the unzipped file and rename it Christmas_theme.lwtp.

4. Cut the Christmas_theme.lwtp file and paste it in the Themes folder.

Now when you go into LimeWire click on View>Apply Skins>Refresh Skins then go into apply skins again and you should see your new skin.

Let me know if you need anymore help.