PDF munging with LaTeX

An aide-memoire for myself:

    \documentclass[a4paper]{article}
    \usepackage{graphicx,forloop}

    \begin{document}
    \pagestyle{empty}

    \newcounter{pdfpagenumber}
    \forloop{pdfpagenumber}{1}{\value{pdfpagenumber} < 115}{
    \raisebox{-225ex}[0ex][0ex]{\makebox[90ex]{\includegraphics[width=12in,page=\arabic{pdfpagenumber}]{mtms.pdf}}}
    \newpage
    }

    \end{document}