The correct way to deploy server is to update all firmware components before installing the operating system. The most common way to update is to burn SPP to DVD or mount SPP.iso as a virtual media via iLO and update each server. You either have to burn a separate DVD for each server for simultaneous updates, or you should configure iLO and mount DVD ISO on each server. Too much time spent on updates...
I'll tell you how to update a lot of servers at one time just by powering them on.
