Yahoo compressed the files into an archive which requires you to extract the files straight on the drive on which you installed Yahoo Messenger, the rest of the installation process being automatically made. In addition to the Yahoo Messenger skins you can also download some new IMvironments which improve the chatting experience and bring several elements to the application. For example, most of them come with images, sounds and a different ‘Buzz’ system. The installation of new IMvironments is even easier than the one for the skins because the Sunnyvale super giant Yahoo demands you to click on a ‘Try it now’ button which automatically brings the files into your instant messaging client. So, have a look at this website to find additional IMvironments, choose the one you like and click on the ‘Try it now’ button.