Deploy Windows 8.1...where is the Answer File?

Hello,

i´m using Server Management Suite 7.5 and i want to deploy Windows 8.1 on a client computer. So the Problem is that when i start the Task "Windows install" i get the error message " Windows cannot read the <ProductKey> setting from the unattend answer file". Thereupon i checked the unattended default answer files and recognize that there is no default answer file for Windows 8 or 8.1! Can anybody give me a solution? it is very important for me to execute a unattended installation, because in future i have more than 100 clients.