There are a lot of online 3D Graphic Header Creation Tool in Internet
You can create images like this in seconds

Here are some of them

http://www.cooltext.com/

http://www.flamingtext.com/start.html

 
To use created picture, right click on it and click save as.
Convert it .gif or .jpg image using an image programme. Then you can upload it to your picture album and can use in your web page.