This tutorial will show you how to get as many powerups as you want. Not A Point Mod!
Open your save in hex edtior, makesure it is a zombie save and search for: zombie_powerup_drop_increment Change the 2 periods before the last one to a hex value 00 01 (Change the dot and the d)
Before
After:
Below that you will see zombie powerup max drop or something like that.
change the second to last period's hex value before that to 09. This means you can get up to 09 powerups per round.
Before:
After:
And your done! just run through hash block calculator.
I'm not sure why, but this mod takes a while before it goes into affect. But once it starts it will work for every round.
Open your save in hex edtior, makesure it is a zombie save and search for: zombie_powerup_drop_increment Change the 2 periods before the last one to a hex value 00 01 (Change the dot and the d)
Before

After:

Below that you will see zombie powerup max drop or something like that.
change the second to last period's hex value before that to 09. This means you can get up to 09 powerups per round.
Before:

After:

And your done! just run through hash block calculator.
I'm not sure why, but this mod takes a while before it goes into affect. But once it starts it will work for every round.