% \VignetteIndexEntry{vignette}
% \VignetteKeywords{keywords here}
% \VignettePackage{package name}

\documentclass[a4paper]{article}
\usepackage{hyperref}
\usepackage{pdfpages}
\begin{document}
\SweaveOpts{concordance=TRUE}
\includepdf[fitpaper=true,pages=-]{huge.pdf}
\end{document}