Dell Latitude E5450 SATA RAID Floppy Drivers

Hello all.....I need help with this Laptop in that I'm trying to boot it from a ASUNSOFT made bootable Flashdisk so as to reset a password for the admin account.  I've done this many times before with no issues on many other Laptops and Desktops.  However on this Laptop it crashes when it starts running the Windows PE software with a BSD!  I've also seen this many times before so I just usually need to install the 3rd party drivers for the HardDrive and controller.  However when I go to the dell website and download the Floppy version of the Drivers for the SATA Controller and use them and press F6 while booting from the Flash Drive it gives me an error saying "TXTSETUP.OEM not Found" and cannot continue.  Has anybody come across this before and if so how did they get around it.  Thanks in advance and Happy Holidays to all!