Well, I know what they are, but I still have a few questions: 1. Are they free? 2. How big are they, on average? (compressed/zipped) 3. Can you still run the original version of the game? 4. Do they have online capabilities? 5. Do some games not allow total conversions? 6. Can you have more than one TC in your game? Any other questions are welcome, thanks. JMT