If you have an older Macbook/Pro that does not have the multitouch trackpad then you won't have tap-to-click in Windows. You can scroll, but it is very erratic, you can right click by putting two fingers on the trackpad and clicking on the button with your thumb.
BTW: you will know if you have the older trackpad if you try to upgrade to the new bootcamp 3.0 drivers for the trackpad, they will refuse to install.
I've just given up trying to get a decent working trackpad on my 2006 Macbook, it's just a POS even in OSX.... my solution... bluetooth mouse and just disable the trackpad.