Few days back I bought HP TouchSmart tx2 series notebook to use with Windows 7 (Ultimate) and the main purpose to use it was to test out Windows 7 Multi Touch features. However after installing Windows 7, I was only able to get the support for single touch point or pen. So I checked out from the Device Manager it was showing some unknown devices which were not identified by the system etc etc.
So I was fumbling on many places then I finally came across HP TouchSmart tx2 N-trig DuoSense Multi-Touch Package 2.59 for Windows 7 RC on http://drivers.softpedia.com/get/MONITOR/OTHERS/HP-TouchSmart-tx2-N-trig-DuoSense-Multi-Touch-Package-259-for-Windows-7-RC.shtml.
I installed this and MultiTouch Support on my HP TouchSmart tx2 having Windows 7 RTM – Ultimate was enabled through this and further I was able to install Microsoft Touch Pack and started enjoying MultiTouch Apps.