Patch RedHat 5 to a specific level

Hi,
I'm running Redhat 5.7 on a virtual machine. If I do a yum update, this brings me to RedHat 5.11. However the user has an application which is only certified to run up to RedHat 5.9. Is there a way to specify an update to a specific level, either from the yum command, or from the RedHat customer portal?

Joe DeBattista
System Administrator
University of California, San Francisco
joed@ucsf.edu