Glad to find a friend in the road.
I was testing ideas like you have. Mainly focused on crate a custom installation of MT4. Something like Forex-TSD MT4.
Because that I've asked some help:
Exe Extractor and INNO setup
I was looking for way to include many indicators/EA/servers in one setup.
This indeed to extract a MT setup, include what you want and create a new setup with maybe 100 indicators or more.
Main problem is, as you showed in the picture, after setup is running a temp folder (presetup) is created but the file inside are delivered in a way I can't understand.
I believe the next step after you've clicked everything the setup will unpack the default files.
Maybe we could work together.