installationProgress.beforeIE6XPSP2InstructionsHtml Property

var u = $au.uploader({
    //...other params...
});
var ip = $au.installationProgress(u);
ip.beforeIE6XPSP2InstructionsHtml("<p>To install Image Uploader, please reload the page and click " +
"the <strong>Yes</strong> button when you see the control installation dialog. " +
"If you don't see installation dialog, please check your security settings.</p>");
//...other params...
u.writeHtml();