Hi,
I found out the reson for the missing usbuhci.sys. The driver is NOT
included in the ich7usb.cat file provided by Intel!
1) First I removed the NTamd64 sections from the ich7usb.inf file because
the import function of CD can not handle it.
2) I added the usbport.inf file into the same directory where I imported the
ich7usb.inf file because there is a reference from the ich7usb.inf to it. If
you do not so the import will not recognize the resource property of the
component. Keep in mind that you copy all neccessary files (here just
usbuhci.sys) to your repository directory. The Windows driver files are NOT
provided by Intel with the infinst_autol.zip file.
3) And add all the other USB relevant components to your image.
And it will work.