In-game object interaction.

Hi,

I need some pointers on how I can make the mouse to interact with objects in the game.
What I would like to do is from a first persion mode, freeze the camera and use the mouse to pull, drag, push objects in the environment.
(for example open doors, drawers, pull a lever...)

I have been looking around the forum quite a bit and found the advance camera mod and ode support stuff,
which could get me a bit on the way regarding camera and physics.

But I have not seen anything about object interaction with the mouse.

Have anyone done/seen something like that?

Thanks!