Hi there.

jcl is usually not replying to posts in the forums on weekends. This is also not exactly the right forum for your questions. However, I will try to answer them for you.

1. In order to use that plugin you will need to put the library (.dll file) into your plugins directory and you will have to include the header file that comes with it into your project. The manual explains how to do those things.

2. That is entirely up to you and it also depends on your definition of "big". It is technically possible to use motion detecting in "big" games. The only question you should ask yourself is whether it makes sense for your game or not.

If you have specific questions regarding the plugin, you should contact the author of it. Also you should be more patient as you cannot always expect replies to your posts within a few hours.

Hope this helps.