The script extracts the preamble of the document and runs all \begin{postscript}...\end{postscript}, \begin{pspicture}...\end{pspicture} and \pspicture...\endpspicture separately through LaTeX with the same preamble as the original document; thus it creates EPS, PNG and PDF files of these snippets. In a final pdfLaTeX run the script replaces the environments with \includegraphics to include the processed snippets.