problem how to install RatOS-v2.0.1 on Pad 5

Good afternoon, does anyone have a tutorial on how to install RatOS-v2.0.1 on Pad 5 of Big Tree. I'm trying the old way but when I turn on the pad's LCD it blocks access to RatOS-v2.0.1 and keeps asking for the password on the display itself as if it were putty