I created this for the nook, but it works here. The problem with Adfree is that the /system partition is mounted in read-only mode. If you use a program called "mount /system (rw/ro)" to mount /system in rw, then Adfree works. Or just used that attached program. It will automatically mount /system in rw mode then download the hosts file from the net then remount /system in ro mode. The hosts file changes a lot so keep going back in the program to get the lastest version. The program has to be re-ran after every nightly.