You Can use WAIK to create the answer file unattend.xml.
Build the reference machine from DVD/USB accept all default. When you reach the first logon welcome screen press ctrl+shift+f3 this will put you in the builtin administrator account.
Then install all the software / drivers you need the machine will stay in that state until you run sysprep.
Please follow the link below for more information.
Sysprep a Windows 7 Machine