Using the Windows Update Troubleshooter definitely helped get the iWork8 to take 1511; just took a long time to install.
Had to turn off Hibernation & the Page File. (Used the X98 GPT.bin mod to initally shrink Android to a 5GB partition instead of an 8GB one).
Once it was all done; did Reset This PC via Windows Recovery so everything is as if it was Out Of Box (everything was re-enabled).