And to use the packages, it depends which partition you install from.
To install from same partition
1. Start update via mac app store
2. Move packages into /Library/Updates/031-87119 for the delta or /Library/Updates/031-87117 for the combo.
4. Go to updates tab in mac app store and click update
To install from different partition with El Capitan
Just run the packages individually, carefully selecting the Sierra partition on which to install.
(El Capitan is still available in mac app store at https://itunes.apple.com/app/os-x-el-capitan/id1147835434?mt=12 )
The beta has been re-released with a slightly higher build. The build previously posted was for 16C32e.
10.12.2 beta 1 re-release build 16C32f links:
Same instructions as above except that if installing from the same partition they go into /Library/Updates/031-88399 for the delta or /Library/Updates/031-88397 for the combo.
And the public beta 1 has now also been released - same build as the developer re-release, i.e., 16C32f
10.12.2 public beta 1 build 16C32f links:
Same directions as above except that if installing from the same partition they go into /Library/Updates/031-88398 for the delta or /Library/Updates/031-88400 for the combo.