[CentOS] operating system upgrade/reinstall

Mon Sep 27 03:45:09 UTC 2010
Zhiyong Zhang <zyzhang at stanford.edu>

Hello,

I am planning to upgrade the operating system from CentOS4.8 to the latest CentOS5. Is there a detailed, step by step instruction on the installation/.upgrade procedure? 

Thank you very much for any suggestions and advices, 

Sincerely, 
Zhiyong