D'après ces deux sources et en actualisant avec la documentation de mapProxy, voici la marche à suivre.
su -
installation des paquets + yaml + proj
rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noa...
yum install libffi
rpm -Uvh http://elgis.argeo.org/repos/5/elgis-release-5-5_0.noarch.rpm
yum install proj
yum install make gcc gcc-c++ python26 python26-devel PyYAML zlib-devel freetype freetype-devel libjpeg-devel
en tant que non root
mkdir ~/envPython
mkdir ~/envPython/mapProxy
wget --no-check-certificate https://github.com/pypa/virtualenv/raw/1.6.1/virtualenv.py
python26 virtualenv.py --distribute ~/envPython/mapProxy
cd ~/envPython/mapProxy
source bin/activate
easy_install pip
pip install pyproj
pip install MapProxy
mapproxy-util create -t base-config ign
cd ign
#modifier le fichier de conf
mapproxy-util serve-develop mapproxy.yaml
exit
http://192.168.1.200:8080/demo/?wms_layer=FXX.ORTHOIMAGERY.ORTHOPHOTOS&format=image%2Fpng