Load your XBAP from a HTML page using an IFRAME. In the HTML page add a title and icon.
Something like this:
<html>
<head>
<title>This is my title</title>
<link rel="shortcut icon" href="http://wherever.com/icon.ico">
</head>
<body>
<iframe location="something.xbap"
style="width:100%; height:100%; border:0; overflow:auto" scrolling="no"></iframe>
</body>
</html>
This is simplified from code that I actually use, except due to some other requirements I'm giving the iframe an id and setting its location using JavaScript in the body's onload event. I assume the above will work just as well.