How to bundle httrack into a python 3 executable

There is a great website copier that I would like to bundle in my executable, created with python 3 and py2exe.
On the HTTrack official website in the FAQ section they say that there is a DLL/library version available.
But I don't know where to start, or even how to use the DLL once it would be bundled in the executable.
So how can I bundle httrack into a python 3 executable, and use its features to start copying websites?
Edit:
I found httrack-py 0.6.1 but it only supports python 2 and uses an old version of httrack, so I can't use this for my executable.