Its not a hack or glitch so you dont need anything

2.1.go to private match 2.game setup [fade:3f7ce21434]3.mode [/fade:3f7ce21434]4.alternate modes 5.infected

[fade:3f7ce21434]you can change all the infected setting yourself.
p.s [if u dont wat zombies to have no ammo pick perks but no guns and ull get pistol with tac knife
Thank and Rep. [/fade:3f7ce21434]
Shawry