I'm thinking you're talking about the touchpad maybe?
You talk about mouse scrolling, but you say two finger scrolling. I'm sorry but that doesn't compute. Are you by chance talking about the touchpad? If so, that's built into the laptop, and the controls are in the mouse applet I mentioned before. If what you want is not there, I doubt if there's anything you can do but buy a real mouse with the controls you want. I've always found a mouse much better than the touchpad anyway.