I've tried:
window.document.body.innerHTML = "...." but this removes the html head
tags and I only see the body html of the document I'm trying to load.

I've also looked into possible using this: "__exchangeHTMLDocument__"
but I'm very unsure how to go about doing this.

Any pointers would be great.
Thanks you.

Sorry for the delayed response, I was off the grid for a couple days.

doc.baseURI = url;
HTMLParser.parseDocument(text, doc);
Envjs.wait();

which should do the trick. (where doc may be the global document, text is
you html string, and url is what document.location will use to report url
parts)

PS, setting document.async = false makes parsing much much faster at this
point until we have time to track down an issue.  this basically has a trade
off that you cant use document.write calls mid-parse but we will get that
fixed soon.

Thatcher