Overriding The Installed Default Design Space Content - adobe-photoshop/spaces-design GitHub Wiki

Design Space content by default is installed under Photoshop's .../Required/Plug-Ins/ directory. However, Photoshop supports user-installed plug-ins in an "outer" Plug-ins/ directory, and you can use this directory to "install" a Design Space content update which will be used, if found, instead of that under .../Required/Plug-Ins/.

This "outer" Plug-Ins/ directory is not created when Photoshop itself is installed, but the following paths can be created, and updated Design Space content placed into it. In the Photoshop application root directory:

(Win) `C:\Program Files\Adobe\Adobe Photoshop CC 2015\`
(Mac) `/Applications/Adobe\Adobe Photoshop CC 2015/`

create the Plug-Ins folder, then a Spaces folder within that.

The new Design Space content needs to be copied into a folder named www in the Spaces folder:

<photoshop root>/Plug-ins/Spaces/www/...

If the content is "installed" correctly, there will be a manifest.json file directly under Plug-ins/Spaces/www/

The next time you start Photoshop and enable Design Space, it will use the new content you provided.