I haven't come across this particular problem so bear with me while we try to work it out.
First check the basics: is dhcp3-server actually installed, and does the group dhcpd exist on your system?
Second, the conf file is written by bash (lines 706 onward). The content of /tmp/dhcp.conf may be a problem, but I don't see how the file doesn't even exist! Unless the script is failing and exiting before it gets to line 706??
You've probably already done this, but could you run the script in debug mode, and post the relevant output?
bash -x path/to/PwnSTAR_0.6