Down load 1 to 4 and unzip. Then down load 5-6 and unzip. Open 5 and 6 then grab all the files and move to 1-4 file, overwrite when prompted. then hit exe in 4-5 to play (you can also rename file to chapter 1 to 6.)
If you just want chapter 6, download them both, right click and hit "show package contents" on both, drag the contents folder from 5-6 into 1-4, and then hit "merge" when it says that there are duplicates.
