um isnt that in os-x rather than windows or does the setting cross over
The setting is OS dependent. You set that in MacOS, it'll apply only in MacOS.
From what I remember, Windows doesn't have the appropriate setting, so you'll need to install a Synaptics (or similar) driver, to get full use of the features, like I had to do for the equivalent control over the ATi MBP graphics in both OSes.