1. Configure your task sequence to copy the driver to local HDD.
xcopy Source destination /E /Q
Command Line : Xcopy %DEPLOYROOT%\$OEM$\All %DESTINATIONLOGICALDRIVE%\MININT\ /E /Q
2. Configure FirstLogonCommand in Unattended.xml ( in 2008 ) or GUIRunOnce in Unattended.txt in 2003 to run the setup package. In our case, I use a Script to do the install , but You can directly call the Broadcom setup ( e.g. path\Setup.exe” /s /v/qn) – Please refer Broadcom setup unattended reference for more info.