Did you extract both parts of the files and copy and paste the ones from part 2 into part 1? The compressed files aren't linked, so you need to do that manually.
Otherwise, we'd need a lot more information to figure out what might be wrong. This applies to any error reporting, details matter. So in this case, when does it get stuck. Is it on starting the game, after a specific scene / dialogue / mission area?
Other more general things that help figure out the issues are did you follow the installation instructions properly, where you installed to (Windows doesn't like things run from the default programs or windows folders), what you were doing in the game / program when the bug happened. If there is an error message, what it says exactly and any error log that is made.
BaasB , could you maybe add the extra copy and paste steps the game needs for installation into the first post, since then it's at least written in the first post people should read for what is a fairly common issue people have with the game.
