\documentclass{article}
\usepackage{epsfig}
\begin{document}

Natural size, centered
\begin{center}
\epsfig{file=dilbert.ps}
\end{center}

Width scaled to 3.0 inches, right-justified
\hfill
\epsfig{file=dilbert.ps,width=3.0truein}

Use \LaTeX to process this document
\end{document}