As title suggested, is there any way to enable the same "natural scrolling" and function on the trackpad (gestrures) on Win7 that would otherwise be possible while running OS X?
Simple answer: no. Windows does not have support for those gestures. As I mentioned on another thread, the OS (Windows) needs to support gesturing, as well as the hardware.
Although the following is for the Magic Trackpad, the same functionality applies to the built-in trackpad for Macbooks: