I was tired of looking around to find any good comprehensive torrent for CnC3 so I made my own with my custom ISO images.
The torrent contains just 3 files:
 *Tiberium Wars ISO
 *Kane's Wrath ISO
 *Install Instructions

The 2 ISOs are not just the DVD rips, but custom comprehensive files that contain the installer, patch to latest versions (1.09 Tiberium Wars and 1.02 Kane's Wrath), serials and cracks so you don't have to browse for them.
With the latest version of both games you're already able to install mods, custom maps and online patch.

For mods, go to:
  https://www.moddb.com/games/cc-kanes-wrath (Kane's Wrath)
  https://www.moddb.com/games/cc-tiberium-wars/mods (Tiberium Wars)

For custom maps, check out: http://www.cnclabs.com/maps/cnc3/

To play online