In this example, you immediately enter full-screen mode when you click the image.
To activate immediate full screen:
<script>
MagicTouch.options = {
'fullscreen-only': 'true'
}
</script>
To change the message overlayed on your image, create a PNG image with transparency (example). Refer to it using fullscreen-only-image and the full URL of the image you want to overlay. For example:
<script>
MagicTouch.options = {
'fullscreen-only': 'true',
'fullscreen-only-image': 'http://www.example.com/enlarge.png'
}
</script>
To allow the Magic Touch™ SWF to access your PNG, you should save this crossdomain.xml file (right click the link and "Save as") and upload it to the root of your website i.e. http://www.your-website.com/crossdomain.xml.