[CentOS] Upgrade from 3.x to 4.x via yum

Thu Apr 12 15:16:08 UTC 2007
Jeff Coleman <jcoleman at rstrat.com>

Sorry for the noob question.  I am trying to upgrade an older server from
3.x to 4.x via yum.  Yum is resolving the original 3.x repositories and does
not appear to be moving to 4.x due to the fact it still wants to use a 2.4.x

Do I need to point yum to another set of repos in order to upgrade versions?