Replace a composition with one from another file

[Florian Walther]

Someone created some AE files for me. I opened that project in AE and adjusted some compositions to my liking. Now he sent me an updates version of one of the existing compositions. I want to import this updated version into my existing AE projects, so that I can keep it together with the other compositions that I've already modified in one file. I figured out how to import a composition and it works. But I would like to replace all the files, controls, etc this new file depends on for the old ones, because they should be the same and I want to avoid gathering unnecessary duplicate files in my project.

I hope the image makes my problem more clear. The End Screen in the red box is supposed to replace the End Screen in the green box, but I would like to link it to the existing _Footage and _Solids folders and delete the newly imported ones (everything in the red box). Is that possible?

[Mylenium]

Select the comp in the project window, Alt+drag it into whatever layer you want to replace in the timeline. Run a File --> Dependencies --> Consolidate to get rid of duplicate assets.

Mylenium

[Florian Walther]

Can you elaborte the first part? What exactly do I drag where? And how do I get rid of the new nested folder structure?