Extract the Internet Explorer cab files using the -X switch (like IE9-Windows7-xxx-xxx.exe -x:c:\temp\ie9)
Delete IE9_SUPPORT.CAB
Extract your WIM file from your WDS (Windows Deployment Server) or copyit from the DVD (x:\DVD\SOURCES\INSTALL.WIM) to C:\TEMP\CUSTOMBOOT.WIM (you can call it anything you want… I always call mine customboot.wim… just make the obvious changes below)