I've finally got it to work. First off, uninstall all the ATI drivers and software you've installed. Then, despite which OS you have, install the WDM drivers from the CD. Next let the OS initiate the New Hardware wizard. Then, right click on My computer and go to Device Manager. Click on the WDM drivers and try to update the drivers. Windows should keep finding new hardware until you have:
* ATI TV Wonder BTCap, WDM Video Capture
* ATI TV Wonder TVTuner, Philips WDM TVTuner
* ATI TV Wonder WDM Audio Crossbar
* ATI TV Wonder WDM Video Crossbar
* ATI WDM Teletext Decoder
Next, go to C:\ATI\support\MMC_7_1_TVWONDER\MMC directory and install the software. Everything should be easy afterward. The software may give you some errors if you've got non-ATI video cards. Good Luck. BTW, don't forget to restart after each sessions.