Rename the shortcut to 'C&C3 Control Panel' Drag 'CNC3.exe' to your desktop, and hold down both and before releasing it, to create a shortcut. Go into the 'Command and Conquer 3 TW and KW\Command Conquer 3 Tiberium Wars' folder. Open a Windows file browser window, paste the copied location in the address bar, and press to go there.
You will see a section at the top that says 'Your games will be installed to the following location'. Install Bibber's Fixed Launchers for TUC. How to start a C&C3 mod if you got The Ultimate Collection