Are you planning to manually enter the PID\PPS for every system? With a total of 40 alphanumeric (8 for PID and 32 for PPS) characters - there's a high probability of error. For example - 0 and O (that's the number zero and the letter "O") or 1 and I (the number one and the letter "I").
Are you planning to use the Intel AMT Director for a small environment only? If going to a higher number of systems (e.g. above 100), you may be better off with Intel Setup and Configuration Service for enterprise mode. This is a free download, and is the enterprise configuration software used by or integrated into SMS plug-in, Altiris management console, HP OpenView for AMT, etc.
Generating and using a setup.bin file may be another solution. Take a look at http://communities.intel.com/docs/DOC-1210. There are other documents\resources on the vPro Expert Center site.