How to convert images to Icons

You can use this tool to convert images to icons and using them in your OS.
The Windows icons max size is 256x256 (Windows Vista) but this tool converts your image in a icon that contains various size (for small icons, etc... like .ico format).

I suggest you to use PNG images that support transparency.

Run the software and a little box appears, right-click on it to show options...
Select the "Choose formats" and set the options to configure the max icon size.
Drag and drop your image in the box and the icon will be created (in the original image path)

Download:
http://www.pngfactory.net/customxp/logitheque-41-2-telecharger-ToYcon.html