How can I replace fonts in XeTeX?

Question

I'm using XeTeX because I want to use some fonts from my system. The next should work (I think).

I have this:

\documentclass[a4paper,11pt,spanish]{article}
\usepackage[margin=2.5cm]{geometry}
\usepackage{babel}

\font\reenie="ReenieBeanie"
\font\cuprum="Cuprum"

\renewcommand{\sffamily}{\reenie}
\renewcommand{\familydefault}{\cuprum}

\begin{document}
...
\end{document}

The compilation fails, although I get the document with the new font and some weird symbols arround it. What am I doing wrong?

Answer 1

If nothing else, the use of \renewcommand* is pretty suspect. I always use the fontspec package to select font. See if this works:

 \documentclass[a4paper,11pt,spanish]{article}
 \usepackage[margin=2.5cm]{geometry}
 \usepackage{babel}
 \usepackage{fontspec}

 \setsansfont{DroidSans}
 \setmonofont{DroidSansMono}


 \begin{document} 
 \ldots
 \end{document}