\definecolor{notecolor}{rgb}{1,0.9,0.3}
\usepackage{fancybox}
\newsavebox{\mybox}
\newenvironment{sidenote}
{
        \begin{minipage}[t]{.15\textwidth}
                \vspace{0pt}
                \includegraphics[width=.5\textwidth]{pic.eps}
        \end{minipage}
        \begin{lrbox}{\mybox}
}{
        \end{lrbox}
        \fcolorbox{black}{notecolor}{
                \begin{minipage}[t]{.75\textwidth}
                        \vspace{0pt}
                        \unhbox\mybox
                \end{minipage}
        }
}