Overlay in friendster is like designing your own page.
You need to learn the basics of HTML to be able to do that, if not you may still have the option to use some helpful tools, like Microsoft Frontpage and Macromedia Dreamweaver. These are just some of the well-known proggies that can help you out. Plus, if you want to learn it more advanced like having an animation in your site. Nowadays, FLASH-based website are becoming more popular. You might include in your to-do list learning Macromedia Flash. Javascripts are also there to enhance your website more. You could do it your own code or just simply search in some site that offers it free. ^^
So once you have your page for example. You can Overlay your codes now. Copy your HTML code and paste it in
http://www.markyctrigger.com and press the generate button. Copy and paste the result below in you Friendster CSS Media Box.
That's it. Your done. ^^
I hope i did help you out. :)