virtualbox.org

I am on a MacBook and I am running Windows 2000 to do some work with. The problem is that I am trying to find a Driver for Windows to use for Video. this 16 Color stuff isn't really cutting it or me. Any help would be appreciated, thank you.

Just install the guest additions (in the guest)
See Chapter 4. Guest Additions in your VirtualBox users manual.

I turned on the graphics acceleration for 2D and 3D but the basic Windows form is still laggy due to the lack of a decent video driver. There is no way I can download an NVidia Driver? I apologize for my lack of knowledge with this software, I read over the guide multiple times..

You simply need to install the guest additions in the guest. You cannot install other video drivers in the guest as it not using the video card directly.
Click on the devices tab at the top of the guests window and then click on install guest additions.