Ok, here's my latest update, sadly full of all fail.. or mostly of fail.
i own a Macbook Pro 13, early 2010 model and in turn have legit Boot Camp drivers on the OS X Snow Leopard restore discs. I copied the whole Boot Camp folder to my pc (window 7 ultimate 64bt edition, non mac hardware). Previously i was able to get boot camp installed and updated to the latest 3.1.35 but was never able to get full multitouch gestures to work, just the basic maouse functions mentioned previously. At the same time, the boot camp drivers messed up my desktops audio (it also has a realtek based codec and my bluetooth, similar broadcom chipset).
I have restored to a previous point and am back to normal working.
This evening I thought I'd attempt to break out my app dev/deployment kung fu and use some msi modifying/repackaging tools to get it working.
I've been able to craft my own msi 64bit installer that incorporates boot camp v3.0 + msp update to 3.1 + update to 3.1.35 w/magic trackpad drivers. i basically stripped all packages of references to all drivers except the multitouch touchpad, trackpad.
thus far, i get Boot Camp installed and on v3.1.35 but do not get any magic trackpad or touchpad options in the boot camp control panel, only brightness and power. however, i am able to get the trackpad options to show but in turn it breaks my trackpads basic functions.
here's what happens. i pair my magic touchpad to my desktop pc's bluetooth. it shows up as a basic bluetooth HID mouse device. i pair it and it lets me move and click to left-click with it; no gestures at all or even right click. after it was paired, i went to my device manager and manually updated the hid bluetooth mouse driver to the Apple > Multitouchpad Enabler. Once i do this, i can see the extended gestures features in the Boot Camp control panel but also lose all functionality of the trackpad (ie no movement or clicking).
i'm using this info to plant the seed to the community and see if we can figure out a way to get it working on a non mac based system. this baby could be amazing for HTPC use or even just desktop/work use.
peace