Windows 7: Windows 7 64 Bit Enterprise Bootable USB

Greetings,

I googled and could not find what I'm looking for. Basically I am taking over the imaging process where I work. I will to start configuring our application to create universal images.

The first thing I would like to know is, I created a bootable (tested and used) Windows 7 64bit Enterprise USB flash drive. I would like to make this universal so when a new machine comes in I can either add new drivers if need and install from the USB.

Currently I have to install the drivers after the installation of windows has completed.

1. Which folder in can I add the drivers into? I am thinking of creating sub folders for each model and another subfolder for the type of driver ie. video, nic etc
   
2. I also created an autounattended.xml file and it always halts at the create partition wizard. If I manually install windows, windows 7 will create a second partition that is 100mb. I read in forums where most people only create 1 partition. Does it matter how many my autounattened file will create? Why would it fail?

Thank you

Microsoft Deployment Toolkit.
Microsoft Deployment Toolkit