It is best policy to create the PolicyPaks from the same operating systems as the client computers.In this case, you may want to install Design Studio on an XP and Vista machine as well and create the designated PolicyPaks. Or, you can first create the paks on one machine type then re-capture the AppLock codes on the second machine type. See the section “How to Merge PolicyPaks using the pXML Merge Wizard” in the PolicyPak Design Studio guide.