The usual way to download the crossfire code on sourceforge is by using svn .
This is described here .

I found out, that downloading the code can be done by rsync, too.

rsync -a -v a.cvs.sourceforge.net::cvsroot/crossfire/$MODULENAME

The above shell code would list the files.

mkdir -p ./NewDir/
rsync -a -v a.cvs.sourceforge.net::cvsroot/crossfire/$MODULENAME ./NewDir/

The above shell code would download the files into ./NewDir/ directory.

MODULENAME would be the usual arch, maps, client, server, et cetera.

A short test for the /sounds/ directory worked for me. It downloaded mainly `,v' archive files, which need to be checked out using rcs .