Here is one way. You will need to replace beamer_test with you own beamer PDF.
If you don't want to overlay the scripts, just use \newpage instead of \pause.
\documentclass{article}
\usepackage{geometry}
\usepackage{graphicx}
\usepackage{everypage}
\usepackage[display]{texpower}
\newcounter{pdfpage}
\geometry{paperwidth=10in,paperheight=3.8in,left=5.2in,top=.2in,right=.2in,bottom=.5in}
\AddEverypageHook{\stepcounter{pdfpage}
\raisebox{-2.8in}[0pt][0pt]{\rlap{\hspace{-1in}%
\includegraphics[page=\thepdfpage]{beamer_test}}}}
\parindent=0pt
\parskip=\baselineskip
\begin{document}\Large
This is the script for the first page of overlay.
\pause
This is the script for the second page of overlay.
\end{document}


OTOH, it appears I've reinvented the wheel.
notesbut it has a few quirks that you will find out soon :) – percusse Mar 28 '15 at 10:18show notes on second screenset (example, page 201 of manual)? – Joseph Wright Mar 28 '15 at 19:18