There is an updated driver for the Zboard keyboard if you have the USB version. Steelseries bought out Ideazon years ago and now produces the drivers for it. However, if you have the even older PS/2 version, XP drivers are the best you can get.
If it happens that you have the PS/2 version, you get buy the Steelseries Shift keyboard ($89.99 retail) and your old keysets will still work with the new keyboard. If you don't want to spend so much on a new keyboard, you can also find a number of them on eBay for various prices. The keysets are cross-compatible with the original Ideazon PS/2 and USB keyboards, Steelseries Zboard USB, and Steelseries SHIFT (USB) keyboards.
The Steelseries USB and Zboard USB keyboards are identical except for the rebranding. The Shift version has a slight design change, but is still completely compatible as I said.
You can download updated drivers from Steelseries here:
http://steelseries.com/support/downloadsJust scroll down, select the keyboard you have, then click the download link that will appear at the bottom.
(I know all this because I've had a Zboard for years. Some of the sensors stopped working, but I have many keysets. I'll be replacing it with a Shift board soon.)
Oh, I should add that if you have a PS/2 version, even if you get the driver to install, the keyboard will not work correctly. It must be the USB version if you're using anything after XP.