Help with BIOS flash

I have tried to find the answer on the google, but I am having trouble actually understanding the steps. I have a dell xps 15 L501X laptop (windows 10) and I would like to install a version of the BIOS that allows me to disable hyperthreading. I have the version of BIOS, but actually flashing it to the motherboard is where I am at a loss. To my understanding, I need a crisis disk backup of the BIOS first in-case I brick my computer. I have a FAT32 formatted USB and all of the files I need (I think). This is what the readme in the crisis backup of cracked BIOS says to do in order to create a backup:

What you will need (or at least this is what have!)

1. One working computer with USB port (Mine Dell Inspiron E1505)
2. One USB flash drive (Mine 1GB micro center)
3. Phoenix Bios Crisis Recovery program
4. The CORRECT phlash16.exe program
5. Bios image for Studio XPS 1645 (I have the A03 version in .WPH format)
6. One Bricked Studio XPS 1645
7. Patience

To make the things easy for you, I will zip all needed files and will try to attach here for download.

Here what you need to do.

1. Download the zip file from here
2. Extract the contents to any location
3. Plugin your USB flash (All information on it will be lost!)
4. Navigate to the folder where you extracted the zip file
5. Run as Administrator WINCRIS.EXE
6. Click START

If everything is ok you will have a bootable flash drive with exactly three files on it

1. BIOS.WPH
2. MINIDOS.SYS
3. PHLASH16.EXE

It does not actually tell me anything about how to flash the new BIOS. Still trying to figure this out.

My questions:

Now can I even do this on windows 10? The program won't run.

Is there other software I can use to create a crisis backup?

To actually update to the cracked BIOS, how do I do that, in DOS? I am confused.

Sorry if it is too much to ask to help me here, but if someone could try I would really appreciate it.