I was now able to get flightgear 1.0 32bit (special portable )and flightgear 2020 3.6 August 10, 2020 build working in ramdisk.
The portable 1.0 build starts up with windows, and after a plane crashes, shift+escape works to reset the plane .
The software I am using is IMTools
ImDiskTk-x64.zip on sourceforge dated 7 27 2020
Has anyone tried a ramdisk on linux with flightgear? I like it loading faster....