DISM driver mounting error.

Hello, I am attempting to install Windows 7 on a new computer I built using an ISO image I made on a flash drive. Currently I am able to access the bios, and everything seems recognized, boot order is correct, etc.

When I insert the flash drive into a port, the computer boots to it, and I get the first screen for windows installation. After clicking "install now" I receive a message saying a required CD/DVD driver is missing, and I am unable to move forward.

The flash drive is an USB 3.0 drive, and I have tried using both USB 3.0 and 2.0 ports on my motherboard. Knowing that windows 7 does not have native drivers for USB 3.0, I have tried to implement the following solution outlined here: http://codeabitwiser.com/2014/03/how-to-install-windows-7-with-only-usb-3-0-ports/

I have successfully modified the boot.wim file, but during step two to add the driver to the install.wim file, I receive a message saying the action completed with errors. The following is what is listed in my dism log following the errors.

2015-11-02 19:45:36, Info DISM DISM.EXE:

2015-11-02 19:45:36, Info DISM DISM Image Session: PID=7260 Disconnecting the provider store – CDISMImageSession::Final_OnDisconnect

2015-11-02 19:45:36, Info DISM DISM Provider Store: PID=7260 Disconnecting Provider: WimManager – CDISMProviderStore::Internal_DisconnectProvider

2015-11-02 19:45:36, Info DISM DISM Provider Store: PID=7260 Disconnecting Provider: FolderManager – CDISMProviderStore::Internal_DisconnectProvider

2015-11-02 19:45:36, Info DISM DISM Provider Store: PID=7260 Found the OSServices. Waiting to finalize it until all other providers are unloaded. – CDISMProviderStore::Final_OnDisconnect

2015-11-02 19:45:36, Info DISM DISM Provider Store: PID=7260 Disconnecting Provider: Compatibility Manager – CDISMProviderStore::Internal_DisconnectProvider

2015-11-02 19:45:36, Info DISM DISM Provider Store: PID=7260 Releasing the local reference to DISMLogger. Stop logging. – CDISMProviderStore::Internal_DisconnectProvider

I am unsure of how to proceed and complete the modification without errors. Thank you for your help.