For installation instructions please see the readme contained in the Kvatch Rebuilt download. Please be aware that this walk through contains HUGE spoilers about the Kvatch Rebuilt quest line (as you'd expect!) as well as some very minor ones about the main quest.
Getting Started:
Kvatch Rebuilt (KR from hereafter) will kick into action once you have completed 'The Battle for Castle Kvatch' quest. The next time you move away from Kvatch, around in Tamriel, the NPC's will start to move back within the walls of the city. Then after a about a week a Nord man called Ignar should come and find you with a note from Savlian Matius, the leader of the Kvatch Guard, to start the first quest.
Main Quest Line
Miscellaneous Quests