[Centos] some things missing from addons directory

i was just trying to update a rh9 box to centos 3.4 and ran into a number of issues that i finally realized would be solved by pointing to the addons area. but there are still some things that crop up. one of them is doxygen-doxywizard. there is a new version of doxygen in the 3.4 base, but the addons has an older version, so the yum upgrade gets confused. i don't see php-manual in the addons directory at all, so that is probably not the same issue. with yum is there a way we could have a list of old packages like php-manual that just don't exist anymore and have it uninstall it? for now, i am just tracking down things and removing packages that can't be upgraded. having it all happen automatically would be nice :-).