Вот пример включения рисунка rose как фонового:
Код:
\usepackage{eso-pic,graphicx}
\makeatletter
\newcommand\BackgroundPicture[2]{%
\setlength{\unitlength}{1pt}%
default \put(0,\strip@pt\paperheight){%
\parbox[t][\paperheight]{\paperwidth}{%
\vfill
\centering\includegraphics[angle=#2]{#1}
\vfill
}}} %
\makeatother
\AddToShipoutPicture{\BackgroundPicture{rose}{45}}% here or anywhere in text