This is a copy/paste from another thread that helped me out. Credit goes to gRoberts84.
- Go to SDSetup, download Kosmos + PegaScape, with Signature Patches enabled.
- Follow the Setting up the SD Card - Partitioning portion of https://www.scenefolks.com/pages.php?page=4210
- Extract the zip from #1.
- Copy contents from the payloads folder into sd/bootloader/payloads
- Copy contents of sd into your primary partition (the larger of the two)
- Insert the SD into the switch and boot into hetake as usual.
- If you haven't already, DO THIS! https://switch.homebrew.guide/hacking/caffeine/safetyprecautions
- Once complete, get back to hetake and click on EmuMMC.
- Click on Create EmuMMC and select SD Partition.
- Once complete, get press B a few times to get back to the main hetake screen and click reload.
- Click on EmuMMC to ensure you have enabled in the top left. If not, press Change EmuMMC and select an option from the left.
- Now, press B a few times to get back to the main hetake screen and click Launch > CFW (Emunand)
If you happen to restart the Switch, you'll boot back into OFW, so you will need to:
- Click on News > ReSwitched.
- Follow instructions (Caffeine, tap textbox, wait 5 seconds and press power)
- In hetake, click on Launch > CFW (Emunand).
Once in CFW (Emunand) you need to make sure you are still on 90DNS, or airplane mode. Its also a good idea to change theme colour so you easily know if your on ofw or Emunand.
If you were to reboot your switch and Settings > System (before going through ReSwitched etc) you will see the firmware of your Sysnand is still 4.1.0 and after booting into CFW (Emunand) it will be different.
From there, I use choidujournx to install 8.1.0:
- Download choidujournx (https://switchtools.sshnuke.net/)
- Extract and copy ChoiDujourNX.nro to switch folder on SD Card.
- Download firmware 8.1.0.zip
- Create Firmware folder on SD Card.
- Extract 8.1.0.zip and copy all files in the folder into the Firmware folder from above.
- Insert the SD Card back into the Switch.
- Boot into CFW (Emunand) and check System > Settings to make sure you see (AMS 0.92) in the firmware version.
- Click home button.
- Hold R and press Album twice.
- Click on choidujournx.
- Click on Choose (bottom right)
- Click on 8.1.0 (or 8.1.0 exfat if you decided to format your SD with exfat)
- Click on Select Firmware (bottom right)
- Note on the left that "Prevent fuse burning (enable AutoRCM)" has a X and on the right, it mentions AutoRCM is disabled due to the device being patched. You do not need to change anything, this is forcibly disabled.
- Once complete, click Reboot.
After clicking Reboot it took me back to hetake, where I selected Launch > CFW (emunand)
Now you will be on 8.1.0 on Emunand but 4.1.0 on Sysnand.