Windows 7 does not come with USB 3.0 support

Pre-requisites:
PC or VM with WAIK (or WADK) and ISO editor installed
  > WAIK (The Windows® Automated Installation Kit (AIK) for Windows® 7 and The Windows® Automated Installation Kit (AIK) Supplement for Windows® 7 SP1 )
  > ISO (WinISO 5.3 is completely free now)


1. Download driver from Motherboard CD or Manufacturer's website and copy to c:\temp\driver\x64
2. Copy boot.wim and install.wim to c:\temp from Windows 7 DVD \sources folder
3. Create folders c:\temp\boot & c:\temp\install
4. Run Deployment Tools Command Prompt
5. Within the prompt run to get index numbers
dism /Get-WimInfo /WimFile:boot.wim
dism /Get-WimInfo /WimFile:install.wim

6. Add drivers to all images (the script below is based on 2 images for boot and 4 images for install)
dism /mount-wim /wimfile:boot.wim /index:1 /mountdir:c:\temp\boot
dism /image:c:\temp\boot /add-driver:C:\Temp\driver\x64 /ForceUnsigned /recurse
dism /unmount-wim /mountdir:c:\temp\boot /commit

dism /mount-wim /wimfile:boot.wim /index:2 /mountdir:c:\temp\boot
dism /image:c:\temp\boot /add-driver:C:\Temp\driver\x64 /ForceUnsigned /recurse
dism /unmount-wim /mountdir:c:\temp\boot /commit

dism /mount-wim /wimfile:install.wim /index:1 /mountdir:c:\temp\install
dism /image:c:\temp\install /add-driver:C:\Temp\driver\x64 /ForceUnsigned /recurse
dism /unmount-wim /mountdir:c:\temp\install /commit

dism /mount-wim /wimfile:install.wim /index:2 /mountdir:c:\temp\install
dism /image:c:\temp\install /add-driver:C:\Temp\driver\x64 /ForceUnsigned /recurse
dism /unmount-wim /mountdir:c:\temp\install /commit

dism /mount-wim /wimfile:install.wim /index:3 /mountdir:c:\temp\install
dism /image:c:\temp\install /add-driver:C:\Temp\driver\x64 /ForceUnsigned /recurse
dism /unmount-wim /mountdir:c:\temp\install /commit

dism /mount-wim /wimfile:install.wim /index:4 /mountdir:c:\temp\install
dism /image:c:\temp\install /add-driver:C:\Temp\driver\x64 /ForceUnsigned /recurse
dism /unmount-wim /mountdir:c:\temp\install /commit


If there are errors you can clean up wim and un-mount image without saving changes by running
dism /cleanup-wim

dism /unmount-wim /mountdir:c:\temp\boot /discard


7. Open Windows 7 ISO in editor, delete original \sources\boot.wim & install.wim 
8. Add c:\temp\boot.wim & install.wim to \sources folder and save
9. Burn DVD