Installaing Package on Multiple versions of installation

[vetabz]

Windows8(64-bit)

Again noob here first day in Python.

I managed to install version 3.6.1 & 2.7.13, edited ENV variables and can run both distribution as follows

Python2, simply type python
Python3, I renamed the executable to Python3, so you would need to type python3

I also installed 3 IDEs, ATOM, PyCharm & Eclipse. I'm liking ATOM & PyCharm.

but I have a problem, I can install a package!!!

I want to install Beautiful Soup using straight forward 

pip install beautifulsoup4

that is causing me this error: Fatal error in launcher: Unable to create process using '"'

then I tried,

py -3.6 -m pip install beautifulsoap4

but it's giving me Requested Python version (3.6) not installed

here's another attempt, remember I mentioned that I rename the version 3 from python to python3. So I tried this:

python3 -m pip install beautifulsoap4

but that is throwing me:

Collecting beautifulsoap4

Could not find a version that satisfies the require
No matching distribution found for beautifulsoap4

So basically, I'd like to ask... for something like this where I have multiple versions of python, how do I install packages?