Wanting to add Comment feature to my articles...

[Keledan]

Hi,
I have a php website and a vbulletin3 based Forum on separated domains on the same server.
I would like to add a comment feature in my present news and articles php pages.
I have been searching for a hack everywhere since weeks but I could find nothing which could satisfy me.

I want to show the present comments under the article, so even unregistered users can read them.
Then I would like a quick reply form below the comments. If a user is not logged in, he should be redirected to the login page.
If the user is already logged in, he will be able to easily post a comment.

Please tell me if there is something like this downloadable somewhere, otherwise I will start asking question about how to share cookies and implement the features by myself

Thank you!