To use a Messenger Plus! Live skin, you first need to have the add-on installed.
- Download and install Messenger Plus! Live.
- Double-click the skin packet you've downloaded. It should be recognized as a Plus! Live skin and Plus! will ask you if you want to install it.
- Check "Use this skin (...)" and then click "Install".
- Messenger will be closed and restarted with the new skin activated.
It would also help if you specify a bit more information, such as:
- the name of the skin
- where you got the skin from (website / URL)
That way, it's easier for us to help you with your problem and we can help you quicker.