How to split large game project into smaller ones

Is there any way I can quickly split a large game project into smaller independent ones? I have multiple layouts and event sheets within a game and I want to separate them into separate projects (to create smaller games). I tried moving the relevant files into a different project folder, but it did not work.

Try save-as for each project, then deleting the things it doesn't need?

That will probably work, but it will take a long time. Is there any way to just paste the relevant files into a folder?

I'm gonna guess that would take even longer because then you'd have to manually copy all of the global variables, events, etc into the new projects. Go with Asley's suggestion.