Hi,
See the last question in www.fop2.com/documentation-faq.php for a way to make FOP 2.26 or earlier with Centos 6.
Or you can install version 2.27 (beta) directly
http://download.fop2.com/fop2-2.27-centos-i386.tgz
http://download.fop2.com/fop2-2.27-centos-x86_64.tgz
