I'm running the Ultimate 8 to 9 install as I write.
I ran the Service Center thingy first (started at 6:45 this morning).
The 9 install seems to be "happy" with anything that was updated prior to the 9 install.
Its just after noon here so set some time aside...
Not sure on the 7 to 9 Mike, but probably not an issue.
I'll update on how the "authorization" goes.
Actually a little more "anxious" about the IK updates than NI.
Tom