Here is what I did:
1. download Lenovo Ideapad u330's touchpad driver for vista from Lenovo official website and install it. This driver can enable multi touch of s10.
2. disable the preloaded pinch function, otherwise the touchpad might get confused about your two finger gestures.
3. download two-finger-scroll, it is a project of google code.
4. run the standalone exe as administrator.
5. Have fun then:)
