[Yum] installing an old version of an update

[Jason Keltz]

Hi.

I'm running centos 4.X with yum 2.4.3.  I'm trying to install an older 
version of an "update" from the yum update repository.  The problem is 
that when I do "yum list all", I don't even see the update even though 
the file is there.  In my particular case, I have a script that I use to 
   install a specific set of updates on machines.  It works as long as 
new versions of those updates are not available.  I've tried specifying 
the full version/arch/etc, and it still doesn't work.  Just because a 
new version of an update comes out and is in the repository, I don't 
want it being installed on all of my machines until I've had my own time 
to test it.

Any assistance would be appreciated.

Jason.