General :: ELF Format (Self Extractable Executable) Creation?

I would like to start with simple example:

1. Create a "Hello world" executable.
2. Attach files to it.
3. Add the code in in "Hello" executable to extract the files to a custom location.

1st is simple.

For second, above mentioned article suggest that CArchive can be created using Python. It means you can create a CArchive using "hello" executable and other files. How do you do that using Python?

For 3rd, I need more info about the implementation using C.