Use Flash to create skin elements
If you already know how to use Flash CS4, you'll will be able to create a flash customized Calaméo Skin in no time!
How do I create a Calaméo Skin Flash library?
Be aware that your objects will be positioned according to the flash reference point (the cross in the image below) :

Use Flash as you always do to create graphic elements for all buttons and if needed, all states. You'll have to set an export name for each image, which will be used in the CSML file to fetch the desired element. To set such a property, right-click on your movie clip and go to properties:

Click on the Advanced button, and enable Export for ActionScript. Verify the desired Class name, and exit:

One your graphic elements properly created in your Adobe Flash library, compile (or publish) it to a SWF file.
How to use it
Once your skin is loaded with the library tag, reference it as such:
<button action="zoom" tooltip="no" upState="myFlashCanvas#btnZoomOn">
myFlashCanvas references the loaded library, btnZoomOn is the export name (class) previously chosen.
