[joropito]

You can symlink:

folders: ln -s /originalfolder/somefolder /instance/
files: ln -s /originalfolder/anotherfolder/file.ext /instance/anotherfolder

So what you have to do is:

.- For full folder symlink: symlink folders
.- For folders with specific and global files, create the same folder structure and link global files, create custom files

It's a hard work. I suggest to create your own tar.gz file with your symlinks skeleton, then you can use that file to install each game instance and after that create custom files (or include default custom files in your tar file)


PS: cp -rs will work, but it's better in performance to symlink full folder and not each file.