Re: Lost CD to Command and Conquer The First Decade
The old unofficial TFD v1.03 patch, which is a combination of community fixes, comes with no-CD for most of the games. For the oldest three games, Command & Conquer 1, Red Alert 1 and Tiberian Sun, their specific unofficial patches should do the trick, since all of those are freeware anyway. These specific patches should be installed after the TFD v1.03 patch though, since there have been quite some developments in these patches since the TFD v1.03 patch was created.
You can find these unofficial patches here:
The First Decade:
Command & Conquer 1:
Red Alert 1:
Tiberian Sun:
Note that the unofficial TS patch might not work after the patching done to it by the TFD v1.03 patch. In case that happens, I advise you to download the full freeware version of the game.