Instructions for installing Trillian Skins:
1. Download the .zip file.
2. Open it in WinZip.
3. Click the Extract... button.
4. To the left, MAKE SURE that the All Files option button AND the Use Folder Names check box are clicked.
5. To the right, find your Skins folder inside your Trillian folder. (DEFAULT:: C:\Program Files\Trillian\skins\)
6. Just click on the skins folder, it will make its own sub-folders, just trust it.
7. Close WinZip and go into Trillian.
8. Go to Preferences...Skins...Load Skin Chooser.
9. Pick your skin.
10. Close Trillian (from the System Tray, also) and restart it.
11. Enjoy your new skin!