The first public zombiemod version just has been released!
You can grab it here:

http://www.zombiemod.com/forums/showthread.php?p=40884#post40884

The changes include:
- Fixed variables in config file, the correct variables are zombie_money and zombie_humans_jetpack.
- Fixed zombie_listclasses output, there was nothing wrong with the classes it's the speed setting that's not working correctly, I think 400 is the maximum speed.