This article explains how to make Windows BootCamp scrolling as similar to Mac OS X!
1 Reverse scrolling
There is a registry setting named FlipFlopWheel that does exactly this and can be found after typing regedit in Run and pressing enter which will launch Registry Editor. Then search for keyword FlipFlopWheel.
The search will find multiple mouse entries. The default value for FlipFlopWheel will be 0 and needs to change to 1. After the change reboot in order to take effect.
To get the VID_??? number you need to:
Go to the Control Panel and then go to Mouse, click the Hardware tab, then click Properties.
In HID-compliant mouse Properties window click the Details tab and select the Device Instance Path property. The registry path is in there!
2 Make scrolling smoother
Go to the Control Panel and then go to Mouse, click the Wheel tab, then change “The following number of lines at a time” to 1.