Hm hmmm,
I guess you could maybe add that script tag using the gridder with '+More'->'+HTML'
Maybe that works. I think probably that may not work if you are navigating to the page from within the website cause I think <script> tags are not executed when the website replaces content using javascript which is the case with lay theme since lay themes frontend is a javascript app. Would be much better if you could embed an iframe instead of the script tag