any where. I made a folder inside my Apop install dir for gradients.
You have to load them through the Gradient tool (F6)
WHen you click that or press F6 there is a little icon on the bottm right that looks likea page with blue icon on it. IT says open gradient browser click that another window will open.
This is the gradient browser. Click the open folder icon and go to the path you put your gradient in and double click the ugr file for the gradient. That will open all the gradients in that pack. Than select one and double click it and it will apply the gradient.
