Updating Pacakge to selected secondary servers

[Savage]

Hi All,
I recently inherited looking after our SMS 2003 servers.
Pretty familiar but not with updating packages.

We have a Package for Office 2007 with SP1.
I've gone to where the install files are, and put the extracted SP2 files in
the Updates Folder.

My question is how or what is best practice to update the PCK file, and can
I roll this out to selected secondary servers?
We have over 90 secondary servers and pushing it out to all congests the
network and means an outage for every site at once, where doing selected
servers can help lessen the impact.

Cheers