Do i understand this well, and nobodies knows for 100% how this work? Just for know, why would you hold a old version from ethereum? This version was sick, ill, not worth it anymore. That's why the hard fork...
Good luck to this anyway, but remember, 99% from the people move to the new release/fork.
You have been woefully mislead I'm afraid. There is absolutely no change in the basic functionality between ETC and ETH since the hard fork WAS ONLY a quick fix to recover coins. Your 99% assessment is also wrong. Read up a little, do some research. You will be surprised at what you can find out.