For no CD cracks - try here:
http://gamecopyworld.com/
For GameSpy Arcade -
http://www.gamespyarcade.com/
Although I'm not sure if either of these will help you. The No cd crack certainly won't make the multiplayer mode suddenly work.
What's happening when you try to access the multiplayer mode? Do you get any error messages? It could be something on your PC like a firewall stopping the game from getting access to the internet.