Am I? 16633 has only been out for 3 days for you have to have done it for "some times now." Nevertheless, please let all of us know how considering I tested pkgmgr and peimg from RTM, from 16510 (Server 2008 B3 WAIK) and pkgmgr from 16633 with no success at all when doing a direct integration. Of the 5 cabs included in SP1, the only ones that would integrate were the small supplementary CAB files, not the main SP1 CAB from my tests nor would it integrate with vLite. I presume there is a way but its not as easy as point to the CAB and integrate. Edit: It is also worth noting that when I tried to integrate using the RTM version of pkgmgr, the logs showed that it was looking for a specific version of pkgmgr 16626 in order to work correctly. You need a pkgmgr Build 16626 or higher to do this. There are some Problems because of changes in the new Servicing Stack and some missing files. I can't tell you how to do this because i don't have the time now.