This article
http://spaghettidba.com/2014/01/23/sql-server-agent-in-express-edition/
explains how to install a third party version of Sql Server Agent for 2012 Express Edition.
It says you need the source code for 2008 sp_help_job and says you can extract it from CodePlex but I'm not sure how to extract it.
If anyone has SS 2008 Standard or Enterprise (he didn't specify whether R1 or R2 though) could you post it here please?
Go to the complete details ...