[Image-SIG] PIL Plus and ImageCrackCode

[Franz Struwig]

Greetings,
I'm new to Python and trying to use PIL to:
a) Cross-correlate two images - i.e shift/scale/rotate the one image until  
they produce the best match.
b) Find the Center Of Gravity of each letter on a page.

Any advice or help in the above tasks would be greatly appreciated!

I see that the ImageCrackCode module is able to calculate the Center Of  
Gravity of "features" on a page.  Unfortunately I haven't been able to use  
the module - I don't think I have PIL Plus.

What is PIL Plus, and how can I get it?

Thanks,
Franz