[Plugin: GD Star Rating] What are the php codes to insert manually?

Do you also have a widget to control duplicate posts?

There is a problem with large number of categories and some posts are displayed more than once, I will try to solve that soon.

Have there been any advancements regarding this, I would find it extremely helpful.

All (and there are many now) functions are documented in the info files included with plugin.

Thanks for the reply,

Which function will get me a 10 star rating for the page it is featured on?

As I said, all functions are documented. Check the info files included with plugin.