Running GW8 on NW 6.5 sp7. I simply want to upgrade to GW8.0.1. Is there a
doc somewhere with the steps to simply upgrade the code to 8.0.1 without
making any changes to the setting at all?

I started the upgrade install and came to a screen to select an install
type. One of the choices is Predefined--Install GW components with settings
from a previous installation. While this seems to be what I want, it further
asks for the path to configuration file from a previous installation.

Is the the choice I should use? And, where is the configuration file that is