I haven't played the game yet but I encountered the same error as previous comments have and I wondered if it was from using the ":" in the file name. Typically that, along with other symbols, isn't supposed to be used in file names as a ":" is defined as devices and drives . When you unzip the files the ":" end up as "_". This probably isn't the issue but I thought I'd bring it to attention just in case.
(Edit: Sorry about posting a comment here, I didn't know how else to bring it up.)