Easy Peasy...

Create a new folder called "My Blank Runtime", or similar.

Inside that, create a new folder called "Runtime" Inside that, create all the subfolders you find in Runtime, such as Geometries, Textures, Libraries and so on. If any of those folders normally have subfolders - such as Libraries, for example, create the necessary ones in there.

You can then make a copy of My Blank Runtime, rename it with a meaningful name such as "PE Runtime 1" or whatever, and install whatever you like into it.

Coppula eam se non posit acceptera jocularum.

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