To Install simple upload all of the files in this zip file to your website via ftp then set the chmod/permisions on the includes/config.php file and images directory to 777
To Upgrade upload all files apart from the includes/config.php
If you DO NOT want to replaces the template files do not upload them either but you may not be able to use some of the new features.
Then load yoursite.com/install/ and you will be given upgrade instructions.

Very cool website clone where people can chat with each other!
"Omegle is a great way for you to meet new friends. When you use Omegle, we pick another user at random and let you have a one-on-one chat with each other. Chats are completely anonymous unless you choose to mention personal details, and you can disconnect whenever you like.
If you add your interests, Omegle will try to find someone who is into some of the same things as you, instead of giving you a completely random chat partner."