Did your computer tell you that there were already files called "0cg" or "script.pik" in your game folder? If so then you have to replace them with those that were provided by the patch.
Perhaps you installed the wrong version? I seems like the original version of TNC has compatibility problems with Vista and 7, hence they decided to release an updated version last year. I don't know were you got the game but if you really cannot run it properly then you may consider getting the latest version that can be found in the download section.
If not, then could you please give me a screenshot of your issue?