im using PCTV USB2 1.10 (41004623) software, the "latest" from pinnacle.
to install, you have to right click the setup.exe and set winxp compatibility, and run as admin.
after the install is done, go to device manager and look under sound. Youll notice an error for pctv usb2 pal. Right click that and go to properties and manual update driver.
point to C:\Program Files\Pinnacle\PCTV USB2\Vision, and let me pick from a list.
now you should see pctv usb2 2821 audio, double click that to install.
now pctv should be working, if theres no picture but sound rightclick-settings-video
just check noise filter, or some interlace and pic should come back.
Also the program "chris tv" should work now for the card in vista.