Is there a way to install this on Chromebook

[snkchaos]

I have this Asus C202 Braswell. Somehow when I ctrl+U on it. Usb drive blinks and chromebook beeps. Nothing work.

So far I tried
I did that RW firmware to enable legacy mode.
https://www.reddit.com/r/chromeos/comments/5pl633/boot_from_usb_asus_c202/
Keys I tried
Ctrl L
Ctrl U

Enable with boot usb command with and without enable legacy mode. (Found out that braswel doesn't do legacy or newer chromebooks.)

Sequence of Commands

sudo bash

crossystem dev_boot_usb=1 dev_boot_legacy=1

sudo reboot

Attempt with this only
crossystem dev_boot_usb=1

I tried same thing with CTRL + ALT + T for shell