PS3 CFW Guides: Accessing Amazon Prime using CFW

First, be sure Amazon Instant Video is installed on your PS3

Open:
dev_hdd0/game/NPUP10021/USRDIR/lithium.conf in a text editor,

Change this

# PSN login is a TRC requirement however it can be disabled by setting the following flag to false
requirePsnLogin=true

Change True to False and then return to the XMB to enjoy Amazon Prime again!!