[jerreddredd]

Thought I would add a few tips. I was using WIN XP

Use Python 2.6.6 (I had problems with 3.0 and higher working with the scripts)
Rename all book file names to remove any spaces. spaces = bad for the scripts.
Once Python is installed you should see windows recognize all the .py scripts and give them a mini icon (looks like a paper with yellow and blue squiggles.
Create a folder and put the books to de-crypt in it along with your python scripts.
I keep the path simple so I don't have to type much (c:\books)
open a command prompt and navigate to this directory. Start>Run>CMD
C:\Documents and Settings\user>cd \
C:\>cd books
now run your python script
C:\books>mobidedrm.py Encryptedbook.azw Decryptedbook.azw UVWXYZ1*2A

The output should be:
MobiDeDrm v0.01. Copyright (c) 2008 The Dark Reverser
Decrypting. Please wait... done

Substitute your book name for "encryptedbook.azw" Pay attention to the suffixes some books have ".azw.prc"
Substitute the name for what ever you want to call your decrypted book for "Decryptedbook.azw"
Substitute your PID for "UVWXYZ1*2A"

And you are done! Hope this helps