go to powerlink.emc.com , navigate here:  Support > Software Downloads and Licensing > License Management  Select Manage Licenses, Connetrix , MDS Series Switch product. Select your switch model and it will take you from there.
I looked and cannot find this information on powerlink. Had anyone done this? I have received a bunch of 8 packs to add to our 9148 switch pairs.  Thanks in advance! Admingirl
HOW TO ADD 8-PORT LICENSES ONTO CISCO 9148