In order to copy files directly from a grid Storage Element (SE) to a machine in Zurich, first do

export DIRACROOT=/disk/dirac/DIRAC
export DIRACPLAT=Linux_i686_glibc-2.3.4
export PATH=/disk/dirac/slc4/bin:$PATH
export LD_LIBRARY_PATH=/disk/dirac/slc4/lib:$LD_LIBRARY_PATH
export DIRAC_VOMSES=$DIRACROOT/etc/vomses
export X509_VOMS_DIR=/disk/dirac/gLite/external/etc/grid-security/vomsdir
export X509_CERT_DIR=/disk/dirac/gLite/external/etc/grid-security/certificates
/disk/dirac/DIRAC/scripts/UserEnv.sh

which will prepare your machine for file-transport.

In the directory where the file should be copied to:

dirac-dms-get-file logicalFileName

for example:

dirac-dms-get-file /lhcb/user/a/abuechle/4273/4273259/inclb_28July09.root

Note: You need a Grid Certificate to do this!