I made a stab at creating my first package, and it is meant to help you easily redirect Notepad to Atom. Basically any time notepad.exe is about to open, Windows redirects the request to Atom instead. It is useful because you don’t have to change file associations on all of the text files, and even right-clicking bat files and selecting Edit works. This approach is used for many Notepad replacements, and I used this method for Sublime Text as well.
Anyway, install this package: https://atom.io/packages/replace-notepad
Then use the menu: Packages » Replace Notepad » Replace Notepad.
It is that simple!
I have only tested on Win 10, so let me know if it works on XP/7. It will only work on 64-bit since I only compiled the stub executable for 64-bit. I can make it work with 32-bit if enough people want it.
Let me know what you think!