Glad it's working. You don't have to edit the DLL, I would have included options but it wasn't worth it for the short time the script would be any use.
To change fonts, sizes, colours etc, open the script up in the script editor and go down to the make image function, you'll see lines like:
oDynImage.Color = 0x000000;
oDynImage.FontFace = "Trebuchet MS";
You can modify those my entering a new font name, and a hex colour code. eg:
oDynImage.Color = 0x0F14A0;
oDynImage.FontFace = "Arial";
Feel free to play around with these, and the background image is in C:\Program Files\Messenger Plus! Live\Scripts\World Cup\Images\ (or your equivalent directory) if you want to change that.