Welcome to Fredminer. This is a method of free CFW for US and JP systems, and cheap CFW for EU systems.
Fredminer requires any DSiWare game. US and JP both have free DSiWare on the eShop.
This method of using Seedminer for further exploitation uses your movable.sed file to decrypt any DSiWare eShop title for the purposes of injecting an exploitable DSiWare title into the DS Internet Settings application.