If you buy the diamond edition, do a double check on the CD keys that come with the software. I bought it recently, and the "documentation" is merely a piece of paper folded. Within are the installation "instructions", and the 3 CD keys (one for original, one for Shadows, and one for Hordes). However, the 3 CD keys should be different and distinct from one another. If they are not, then you will either have to return the software for another (good luck), or contact Atari customer support (by email only), and when they respond, send them a scanned copy of the defective paperwork (to prove it). Then, they might email you back some correct CD keys to use.
Not saying you will have this trouble, but if it happens just wanted to save you some time figuring out the problem.
