No it has not. Maximus-Decim did once include the WDMSTUB.SYS in NUSB 3.1, IIRR, but then he removed it. I can discuss the operation of USB20DRV in more detail, but fact is that if one installs NUSB 3.5, then adds just the files from USB20DRV.EXE manually, and then modifies the USBSTOR.INF to say <HKR,,NTMPDriver,,"wdmstub.sys,USBSTOR.SYS>, it'll work all right. The registry modifications that USB20DRV.EXE makes are not really needed and the USBHUB20.SYS it includes is required just for VIA chipsets... for all others, the one in NUSB3.5 is newer and better. In short, I'd just add USBEHCI.SYS, USBPORT.SYS and WDMSTUB.SYS from USB20DRV and modify the USBSTOR.INF, and that should be enough.