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COMING SOON! DEAD RISING 2 and CASE:ZERO!
Well, it doesn't look like Dead Rising 2 has Infinite Mode, and Case Zero certainly doesn't (not "officially" * ), so there won't be any Infinite Mode Guide. Bummer. Thanks Blue Castle for ruining it for me.
Ok, so there's no "Official" Infinite Mode for Case:Zero, but there is an interesting glitch.
Basically, at the start of a new game, go get the Zombrex from the Quarantine Area, but don't bring the motorcycle back to the Safehouse. Instead, spend some time killing Zombies.
At about 6:45-7:00PM, go back to the Safehouse. Give Katey her Zombrex, and defeat Jed.
Now go back and get the bike from the Quarantine Area and run around with it until about 8:55-8:59PM - just make sure you're back at the Safehouse with the bike before 9:00PM.
After the cutscene, you should be able to go out and the Military will never arrive. This leaves you free to spend some quality time with the zombies of Still Creek!
Granted there's no Survivors or anything, and you can't do the Rebuild The Bike mission, but you can build all the Combo Weapons and blast zombies for a couple of days.
At about 2AM on Day 2, the zombies will vanish and the town will be empty.