Install a Menethis's Zombie Apocalypse server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → Menethis's Zombie Apocalypse)
I mean it's good in every way possible, the lag is nonexistent, the time they provide the server to you within purchase is incredible, not to mention how fun being able to play with friends from a trusted site is, I know I can always trust this site, and their service, 10/10.