lucy24 - 10:30 pm on Mar 28, 2013 (gmt 0)
Option Two is server-side includes. You would have to edit each static file once to allow for the include, and add one or two lines to htaccess to parse html as shtml (assuming you don't want to change every single URL and filename everywhere). But once the include code is in place, it's there forever and you can start adding other stuff as well :)
Why do they want it in the HEAD? Analytics has no effect on page content, so shoving it down at the bottom should work equally well, and will let the page load a teeny bit faster.