\documentclass{standalone}
\usepackage{pgf}
\pgfdeclareimage[interpolate=true]{letters}{mpla-letters}
\pgfdeclareimage[interpolate=true,width=90pt]{logo}{mpla-logo}
\begin{document}
\pgfuseimage{letters}
\pgfputat{\pgfxy(-2.5,1.9)}{\pgfbox[center,base]{\pgfuseimage{logo}}}
\end{document}
