I don't mean to be annoying but I had a few questions on how some parts of the mod was created as I can't work how to re-create them myself and couldn't find anything anymore on the wiki or forums which are the following:

1:How did you Add more factions to play in the campaign at once?

2:How Did you Set the player's rank at the beginning of the campaign?

3:How did you edit the spawn Rates?

4:How did you edit the zombie models?

5:How did you add so many variants for models/zombies?