Let's being realistic...
It's not professional to have more than 80 mb in .exe to run, it could take a lot of time to start up, possibly, it won't run on some computers.
Stand alone executable is stupid idea to deploy videogames with big resources inside of .exe.
Image, Media and custom folders should be separated from .exe, I'm not sure it can load external like sprite images, audios, etc. very similiar to HTML structure, Im not talking about AJAX or Node-webkit filesystem, it's C2 engine that we cannot set path to load sprite sheets.
Isn't possible to separate folders from nw.exe?