Nah, reverse integration means you need to install the OS. vlite only extracts the wim it. Alsp "allowedOffline=false" is set to true in update.mum in the main cab file, which means pkgmgr.exe integrates in into the extracted image. The thing is it doesn't work like that, vlite does something before that with the other updates, but it's to fast for me to see what. But I'm sure isn't anything like reverse integration. Reverse integration also can NEVER EVER break the install because it's nothing more than a normal installation of the service pack. It's just installing windows, install the SP and any other software, do sysprep and capture the image. The fact that it can break means some things aren't put in place by the offline method.