Easiest thing to do is download it from the edonkey network, I use the emule client.
Best thing about ETOS is you can download price updates from the web. But the only problem with is it does not have the ATP function, where you can look up a part number and find out what cars it was fitted to. You also cant seem to look up paint spray or touch up sticks, although if you find out the part number it will give you a price for it.
I just keep both installed on my compy