After you Install the PIL you can check if everything went right (you will need some image to do it)
Open console
C:\Python27>python
Python 2.7.2 (default, Jun 12 2011, 14:24:46) [MSC v.1500 64 bit (AMD64)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import Image
>>> im = Image.open('test.png')
>>> im.show()
>>>
If you have no errors everything went right