Here is a quick guide on how to get the game running for those of you who are less inclined to this kind of stuff.
First you need to download the runtime files in the first thread.
Once you have downloaded it you need to double-click it to run the program. It will ask you to extract the files to a directory.
It will by default just ask you to extract to the directory you downloaded to. Which is usually the desktop.
Once you have extracted the files open the folder that you extracted to and run the setup.exe file.
You will be faced with this screen:
Now, don't panic. Just hit the button on the right. You will be given a few more screens after this but all you need to remember is that you keep pressing the button on the right. You will see the program install.
Now it installs to the Common Files directory which I imagine can confuse people and cause them to lose the download location so here is the location: (exchange the C:\ for whatever drive your windows installation is located on)
C:\Program Files\Common Files\Enterbrain\RGSS\Standard
Ok, that's the main runtime files installed. Now you are going to want to download the actual game itself. This part is quite important.
Once you have indeed dowloaded the game you will have a file called:
TKDemo.exe
Now, double click on the file and let it extract to wherever you wish it to extract to. Open up the folder and double-click "game" and you're away.
Enjoy the game and thank Messenger for making it.