It's a standalone creation so it doesn't need the original game to play. The mode from MPF has reached version 1.5 and weighs in at 670MB. They've converted as many assets as possible.
C&C Renegade is a first-person shooter set in the C&C universe and was a hit back in the day as it let players battle online as they tried to protect their own base, while wiping out the others.
Check ourfor more information and downloads. EA was working on a spiritual successor to Renegade dubbed 'Tiberium' but it was canned eventually.