Centos 5.0 / Red Hat Enterprise Linux 5 / i386:
rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
или
rpm -Uvh http://rh-mirror.linux.iastate.edu/pub/dag/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
Centos 4.5 / Red Hat Enterprise Linux 4 / i386:
rpm -Uhv http://apt.sw.be/packages/rpmforge-release/rpmforge-release-0.3.6-1.el4.rf.i386.rpm
Оригинал тут: http://dag.wieers.com/rpm/FAQ.php#B