Update
I tried setting the following settings from a config file called formativconfig.txt with these values in it
Usage=1
Create Settings for All Users=1
so the install line looks like this now
\CORESTORAGEUPDATESFormativformativruntime.exe /s /allusers /r-040xxxFRxxx8-1Cxxx13 /i-formativconfig.txt
It still isnt working :/
Edited for registration key, oops
