A stupid question, i probably miss something. CentOS 4 provides yum 2.4 RHEL 4 doesn't provides yum, but it is available on a very famous/usefull/high quality third party repository. How RHEL 4 users will use our new EPEL repository without yum ? Of course, if we want good collaboration, we must use the same version than dag and centos. Remi.