Win 7 64 and a Radeon 5970 and its not working for me either.
Tried all compatibility mods, I just get a strange jumpy mouse pointer on the screen and its leaves random trails of its self.
Er guys I just found this. http://www.microsoft.com/windows/compatibility/windows-7/en-us/Search.aspx?l=en-us&type=Software&s=empire%20earth
Says Not compatible for 64bit
I have the jumping pointer and massive graphical glitches. So far I have not gotten past the menu! Unless I can find a fix this is a non starter for me, good thing it was free but if this is the level of support I can expect from GOG why should I purchase any of these games? I thought they would support the games so that they would run on modern kit! This is plain silly to sell products that don't work with the only excuse is that they are cheap...
Sorry for the rant but I was really looking forward to playing this game but disappointed to discover it's broken. More so that GOG didn't fix it before pushing it out as a free download to introduce their services to new customers. "Here have a free game, it wont work but here you go it's free!" Great advertisement for GOG We sell crap but as it's real cheap crap so don't blame us...
AMD Hex @4GHz
DDR3 8GB @1600MHz
Silly rant is silly, you should be ashamed of yourself.
The solution to your problem is in your very post. Make sure you have the latest ATI drivers, and then make a custom application profile for the Empire Earth executable. You don't have to change any setting except to turn Crossfire off. What this does is make it so that when you run Empire Earth, Crossfire is disabled, meaning that your second card is no longer in use. Many older games, both in general, and on GOG, have problems with Crossfire and SLI (Nvidia) configurations.
Next time, please try all available troubleshooting steps before pronouncing your judgement on GOG.com and its services.