diff -uNr anaconda-11.1.2.209__orig/installclasses/rhel.py anaconda-11.1.2.209/installclasses/rhel.py
--- anaconda-11.1.2.209__orig/installclasses/rhel.py	2010-04-25 04:09:38.807535000 +0000
+++ anaconda-11.1.2.209/installclasses/rhel.py	2010-04-25 04:12:42.137535894 +0000
@@ -14,6 +14,8 @@
 import logging
 log = logging.getLogger("anaconda")
 
+import rpmUtils.arch
+
 # custom installs are easy :-)
 class InstallClass(BaseInstallClass):
     # name has underscore used for mnemonics, strip if you dont need it
@@ -46,6 +48,8 @@
                      "See http://www.redhat.com/InstNum/ for more information.")
     skipkeytext = N_("If you cannot locate the Installation Number, consult "
                      "http://www.redhat.com/InstNum/")
+    repos = { 
+             "Packages from CentOS Extras": (None, "http://mirrorlist.centos.org/?release=5&arch=%s&repo=extras" %(rpmUtils.arch.getBaseArch() )) }
 
     def setInstallData(self, anaconda):
 	BaseInstallClass.setInstallData(self, anaconda)