installationProgress.IE8InstructionsHtml Property

var u = $au.uploader({
    //...other params...
});
var ip = $au.installationProgress(u);
ip.IE8InstructionsHtml("<p>To install Image Uploader, please click on the <strong>Information Bar</strong> " +
"and select <strong>Install This Add-on</strong> or <strong>Run Add-on</strong> from the dropdown menu.</p>" +
"<p>Then either click <strong>Run</strong> or after the page is reloaded click <strong>Install</strong> when you see the " +
"control installation dialog. If you don't see Information Bar, please try to reload the page and/or check your " +
"security settings.</p>");
//...other params...
u.writeHtml();