It's the X32 version on a clean install. Shows up as an unknown network controller in Device Manager. Tried installing the complete package from the included CD and the downloaded driver from Zyxel (ver. 6.0 1/6/09). Setup wizard only worked after using compatibility mode for Vista, but still couldn't locate drivers for card. Even tried "Update Driver" under the device properties and did both "search automatically" and "browse" to the CD and extracted file directory; no luck. Keep getting a "Windows could not find driver software for you device" message.
Not sure if it makes a difference, but my card is v2, not v3 that Zyxel posts drivers for. No listing for v2 drivers. I'm assuming it's the same chipset.
EDIT: It appears that the v2 card uses the TI TNET1130 chipset. Zyxel doesn't post any drivers (that I can find) for this card anymore. Good job Zyxel!!! Searching to see if I can find any reference drives for this chipset.