Hmm, one could create a virtual harddisk file (.vhd or more modern .vhdx) on the C-drive with Disk Manangement. Attach/mount it as a different drive and install the new library on it. One can choose to make a dynamically expanding disksize or a fixed size. It would have a minimal bit of performance overhead accessing it. Also, it will not be mounted permanently. You would need to attach it every time you restarted the machine and want to play the game.
https://docs.microsoft.com/en-us/win...ual-hard-disks