Dynamic Javascript snippet used to create the Zenbox (Live chat/Feedback tab) wherever it's desired. It's not perfect, but it works :)

Dynamic Zenbox snippet.js

var _body = document.getElementsByTagName('body') [0];

var zenbox = document.createElement('script');
zenbox.src = '//assets.zendesk.com/external/zenbox/v2.5/zenbox.js';

var style = document.createElement('style');
css = '@import url(//assets.zendesk.com/external/zenbox/v2.5/zenbox.css);';
style.type = 'text/css';
style.media = 'screen, projection';
if (style.styleSheet){
    style.styleSheet.cssText = css;
} else {
    style.appendChild(document.createTextNode(css));
}

_body.appendChild(zenbox);
_body.appendChild(style);


setTimeout(function(){
if (typeof(Zenbox) !== "undefined") {
    Zenbox.init({
		dropboxID: "XXXXXXX",
		url: "https://yourdomain.zendesk.com",
		tabID: "Support",
		tabColor: "#000",
		tabPosition: "Right"
	});
}
}, 200);