USBHS Device Mode Initialization

Can someone enlighten me as to how to initialize the on board USB HS controller in DEVICE mode?  There's a function, '_ux_dcd_rx_initialize()' which takes one parameter (the dcd_io address).  From the USB Device template example it is initialized using the value 0, which seems to point to the FS controller.  Also, the lower level call seems to have an affinity to the FS Controller (it sets bit 12 in register 4004 7000h (Module Stop Control Register B (MSTPCRB) - aka. FS Controller).

Thanks,

Rich